# Sustainable competitive advantage: real or claimed? The six-month test
Source: https://unrivals.com/blog/sustainable-competitive-advantage/
Site: UNRIVALS · Language: en · Updated: 2026-10-06
> A competitive advantage that a rival can buy or copy in six months is only a temporary head start. The real advantage lies in what took years to exist. The test, applied to three Romanian companies, with figures from their ANAF balance sheets.
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Competitive advantage is the ability of a company to win customers and margin repeatedly, because it has something its competitors do not have and cannot easily obtain. Sustainable competitive advantage is the version of it that lasts over time, meaning an advantage that a competitor cannot buy, copy or bypass in the coming years.
Almost any company can write a list of advantages. Good price, fast delivery, a wide range and a warranty appear on almost every list, and each of them is real on the day it is written. The problem is that a competitor can match them within a quarter, sometimes within a week.
**TL;DR.** An advantage that a competitor can match in six months is only a head start, and the real advantage lies in what took years to exist.
The test we use has a single question. If a well-funded competitor decided tomorrow to copy your advantage, would it have it within six months? If yes, the advantage is claimed. If no, because it lacks the time, the relationships or the accumulated knowledge, the advantage is real.
The article applies the test to three Romanian companies whose audits we have published, with their figures from the ANAF balance sheets (ANAF is Romania's tax authority, which publishes company balance sheets). On these three cases, it shows why real advantages sit in the business model more than in the offer.
At the end you will find the 30-minute exercise you can run on the list of your own advantages.
How a fact about the company becomes a sentence on the website is the subject of the article on [differentiation and the unique selling proposition](/blog/differentiation-strategy/). Here I deal with the fact itself, meaning the question whether the advantage you want to communicate exists and will still exist in two years.
## What is a competitive advantage?
A competitive advantage is a difference between a company and its competitors that makes it chosen more often or lets it earn more on each sale. The difference can lie in costs, in the product, in relationships or in the position held in the customer's mind. **Only the difference the customer feels in the decision counts.**
Michael Porter separated, in the article ["What Is Strategy?", published in Harvard Business Review in 1996](https://hbr.org/1996/11/what-is-strategy), two things that companies confuse. Operational effectiveness means performing the same activities better than rivals. Strategic positioning means performing different activities, or performing the same activities in different ways.
Porter summed up his conclusion in a single sentence. *"Improving operational effectiveness is a necessary part of management, but it is not strategy."* **Effectiveness keeps you in the competition, but rarely lifts you out of it.**
The difference matters for a company of 5 or 20 million euros, because many of the advantages it declares are advantages of effectiveness. Faster delivery, a better price and a wider range are improvements to the same activities that competitors perform, so any of them can match them with the same work.
The Institute for Strategy and Competitiveness at Harvard Business School explains, in its [material on operational effectiveness versus strategy](https://www.isc.hbs.edu/strategy/business-strategy/Pages/operational-effectiveness-vs-strategy.aspx), why such advantages do not last. Once a company establishes a better practice, rivals tend to copy it quickly.
## What separates a real competitive advantage from a claimed one?
A real competitive advantage needs time, relationships or knowledge that a competitor cannot buy, while a claimed one can be matched with money or with a decision. **The difference is what it costs a competitor to copy.** It has nothing to do with how good the advantage sounds.
The economist Edwin Mansfield measured what imitation actually costs.
Together with Mark Schwartz and Samuel Wagner, he showed in a study published in 1981 in the Economic Journal that imitation costs on average about 65% of the cost of innovating and takes about 70% of the time. Mansfield reports the result in the [chapter published by NBER on research and innovation](https://www.nber.org/system/files/chapters/c10047/c10047.pdf).
The figure says something uncomfortable for any company that relies on a new product. The competitor who comes second pays about two thirds of your effort and needs about 70% of your time. *The new product gives you a head start, and the head start shrinks from the day of launch.*
Another study asked managers directly what protects them. Richard Levin and his colleagues published in 1987, in the [Brookings Papers on Economic Activity](https://www.brookings.edu/wp-content/uploads/1987/12/1987c_bpea_levin_klevorick_nelson_winter_gilbert_griliches.pdf), the results of a survey on the methods companies use to protect their innovations.
For new processes, 80% of respondents gave lead time and the learning curve scores above 4.3 on the scale of the study, and secrecy was considered more effective than patents.
**For processes, protection comes largely from what you learned by doing.** A competitor can buy the same machine, but it cannot buy the years in which your team learned to use it.
Warren Buffett gave this idea the name that stayed in the vocabulary of investors. In the [letter to Berkshire Hathaway shareholders for 2007](https://www.berkshirehathaway.com/letters/2007ltr.pdf), he wrote that a truly good business needs a durable "moat" that protects its returns.
In the same letter, Buffett adds a sentence that describes the claimed advantage exactly. *"A moat that must be continuously rebuilt will eventually be no moat at all."* The lowest price, which you have to defend in every quote, is such a moat.
## What are the four criteria of sustainable competitive advantage?
A competitive advantage is sustainable when it meets four criteria: it is valuable to the customer, it is rare in the market, it is hard to imitate and the company is organized to use it.
The first three criteria come from Jay Barney's research, published in 1991 in the Journal of Management, together with the absence of equivalent substitutes, and the framework called VRIO later added the condition of organization.
The first criterion already eliminates many of the advantages companies declare. **An advantage that does not change the customer's decision has no value,** however impressive it is for the team. A certification that every supplier already holds is valuable, but it is not rare, so it does not differentiate.
The third criterion, hard imitation, is the one the six-month test checks. Barney also explained why some resources cannot be copied.
These resources have a unique history, nobody can say exactly what makes them work, or they depend on complex relationships between people. **All three reasons need time to exist.**
The fourth criterion is the one missed by the companies that do have a real advantage. The company must be organized to use it, meaning it must put it into the offer, the sales process and the message. A real advantage that nobody outside the company knows produces no sale.
Data is a frequent example of an advantage considered hard to imitate. Andrei Hagiu and Julian Wright analyzed this idea in the article ["When Data Creates Competitive Advantage", published in Harvard Business Review in 2020](https://hbr.org/2020/01/when-data-creates-competitive-advantage). *"In most cases, people grossly overestimate the advantage that data gives."*
Their warning matters for companies that believe a full CRM protects them from competition. In our reading, data becomes an advantage only if it improves the product that the customer sees and if a competitor cannot obtain similar data elsewhere.
The six-month test, in four questions
- It matters to the customer
It changes the buying decision or only sounds good in the presentation
- It is rare
At most one or two of your direct competitors have it
- It cannot be bought in six months
It takes years, relationships or knowledge that money does not bring quickly
- It is used
It appears in the offer, in the sale and in the message, where the customer sees it
The red link is where most advantages fall. **Price, delivery and range often pass question one, then stall.** They stop at the second or the third.
## What do real and claimed advantages look like in Romanian companies?
In the three audits below, the claimed advantages sat in the main message, while the real ones sat in the balance sheet, in the client list or in the experience of the people on the team. Each company comes from a different industry.
**Cablero**, a steel cable manufacturer from Iași, presented itself through "varied range, competitive prices, fast delivery across Romania" and through free shipping on orders above 1,000 lei. A direct competitor, cablu-metalic.ro, already displayed free shipping, at a threshold of 2,500 lei, according to the [Cablero positioning audit](https://unrivals.ro/deck/cablero), made on texts read on September 2, 2026.
Free shipping is copied on the same day a competitor decides to offer it. The real advantages of the company lay elsewhere, in a line that, according to the company, produces one meter of cable every 1.6 seconds and in the clients it can name publicly, from Groupe Renault, through Dacia Pitești, to UAMT Oradea and Dedeman.
The list of works continued with the bridges at Sovata and Crișeni. **A new competitor cannot invent the contracts with Renault and Dedeman.** It can buy a production line, but it needs years of flawless deliveries to get onto the list of a car manufacturer's suppliers.
**Hexagon**, a distributor of screws and fasteners from Ghiroda, near Timișoara, wrote on its website "Guaranteed quality. 2-year warranty". In the [Hexagon audit](https://unrivals.ro/deck/hexagon), made on texts read on September 24, 2026, the warranty turned out to be the legal 24-month warranty itself, cited on the same page.
The second declared advantage was the status of official Milwaukee partner, a brand that a direct competitor, Pentagon, also carries in its range of power tools. Both advantages were real, only that the competition had them too, so they did not pass the rarity criterion.
Hexagon's real advantage was technical knowledge, which Marius Sfîru, managing partner, described in the press, in an interview on May 6, 2026. He gave examples of non-conforming parts circulating on the market, screws with a thread angle of 56 degrees instead of 60 and nuts marked class 8 that are in fact class 6.
*In our reading, knowing which parts are non-conforming takes years of selection and checking.*
The balance sheets filed with ANAF also show a growth of the team that may be the investment behind this knowledge. The team grew from 25 people in 2022 to 49 in 2023 and to 63 in 2025, and the net profit of 2025 was 46.94% higher than in 2024, from 5.09 to 7.48 million lei.
The link between hiring and profit is our reading from the audit, without being an accounting certainty. A competitor can hire as many people in one year, but the technical selection process they run is built over years of work.
**Therezia**, a dairy producer from Mureș, has the clearest example of a real advantage hidden in the model. The company declared in 2015 that it works with more than 1,000 farming families, and our estimate from the [Therezia audit](https://unrivals.ro/deck/therezia), made on data read on September 10, 2026, is about 60 villages in the collection network.
The number itself is not unique, because two large competitors, Napolact and Olympus, also declare more than 1,000 and more than 1,200 farmers respectively. What cannot be copied in six months are the relationships within a specific territory, built over decades of collection.
The 2025 balance sheets show where the advantage appears. Therezia had a turnover of 84.4 million lei and a net margin of 11.51%, while another dairy producer had a turnover of about 176 million lei and a net margin of 4.14%.
**The competitor makes twice the revenue and earns less than half on each leu.** Therezia's net profit doubled since 2023, from 4.7 to 9.7 million lei, in the years when the cumulative profit of the 50 companies in its category, by turnover, fell by 0.3%.
Here too, the explanation through the collection network is our hypothesis, because the balance sheet does not say where the margin comes from. It does fit what Barney's research says about resources built over time, through relationships that nobody can reproduce quickly.
| Company | Declared advantage | Why it fails the test | Real advantage | What built it |
|---|---|---|---|---|
| Cablero | Free shipping above 1,000 lei | A competitor already offers it | Clients such as Renault and Dedeman | Years of flawless deliveries |
| Hexagon | "2-year warranty" | It is the legal 24-month warranty | Knowledge of non-conforming parts on the market | Years of technical selection, in our reading |
| Therezia | Milk from small farms | Napolact and Olympus say the same | Relationships with more than 1,000 farming families, declared in 2015 | Decades in the same territory |
What passes and what fails the six-month test
Claimed advantage- The best price in the offer
- Fast delivery and free shipping
- The warranty that the law requires
- A partnership that others also have
Real advantage- Large clients that can be named publicly
- Technical knowledge accumulated in the team
- Relationships built in a territory
- A process hard to reproduce from outside
The right-hand column has one thing in common. **Every real advantage there took years to exist.** The left-hand column can be matched with a budget or with a decision taken at a meeting.
## How rarely does a competitive advantage last?
A competitive advantage that produces superior performance over the long term is rare, and the research that measured the phenomenon across thousands of companies reaches the same conclusion. Few companies rise above the average of their industry, and even fewer stay there for many years in a row.
Robert Wiggins and Timothy Ruefli studied 6,772 companies from 40 industries, over a period of 25 years, in the [article published in 2002 in Organization Science](https://digitalcommons.memphis.edu/facpubs/12075). Only a very small minority had superior economic performance, and the phenomenon persisted very rarely over long periods.
The authors observed that their results fit best with the resource-based theory, which is exactly Barney's idea. We read the result this way: *what lasts are the resources that are hard to imitate.*
McKinsey reached a close conclusion, with another method. In the [analysis "Strategy to beat the odds", adapted from the 2018 book "Strategy Beyond the Hockey Stick"](https://www.mckinsey.com/capabilities/strategy-and-corporate-finance/our-insights/strategy-to-beat-the-odds), the authors tracked the economic profit of more than 2,300 companies.
How rarely a company rises above the market
- 8% the chance of a company from the middle to rise into the top 20% within ten years
McKinsey, 2018
- ~90% of the economic profit created, almost all of it, goes to the top 20% of companies
McKinsey, 2018
Source · McKinsey, Strategy to beat the odds, 2018
The red card shows how hard the climb is. **A mid-market company has an 8% chance of reaching the top within a decade.** The second card shows why the climb is worth the effort. **Almost all economic profit stays with the top companies.**
The same analysis adds a condition that matters for any company that wants to rise through business model innovation or price advantages. For these moves to raise its chances, its gross margin has to reach the top 30% of its industry.
These studies concern other markets and other company sizes, so they do not transfer directly to a Romanian company of 10 million euros. The mechanism they show is visible, however, in the ANAF balance sheets above, where the margin differs by almost three times between companies that sell the same type of product.
## How is VRIO different from SWOT?
VRIO checks whether the internal resources of a company can support a sustainable competitive advantage, while SWOT lists strengths, weaknesses, opportunities and threats side by side. VRIO answers a precise question, whereas SWOT offers an overview, often without a criterion for ranking.
The practical difference shows in the column of strengths. In an ordinary SWOT, exactly the claimed advantages appear there, meaning a good price, fast delivery and a dedicated team. **VRIO runs them through the imitation test, and most do not survive.**
That is why we use the two tools together, in this order. **The six-month test filters the strengths first.** The SWOT is written only afterwards, with what remains. How we do a SWOT analysis without self-deception is described in the [article on SWOT analysis](/blog/swot-analysis/).
## On which layers is competitive advantage built?
Competitive advantage is built on the layer of positioning and on the business model, but it is often lost on the lower layers, where it does not reach the offer and the sale.
We read it on the four layers of our methodology, from the L1 layer, performance marketing, to the L4 layer, positioning and category, with the AI Brain on L3.
Where a real advantage gets lost
- L4 · Positioning and category
The real advantage exists, but the company presents itself through the claimed one
- L3 · AI Brain, orchestration
AI engines find the advantage written nowhere and repeat what everyone says
- L2 · Revenue and sales process
Salespeople negotiate on price instead of putting the real advantage on the table
- L1 · Performance marketing
Campaigns promote delivery and price, which is what anyone can match
The figure reads from the bottom up, and the red level at the top shows where the problem begins.
**L1 · Performance marketing.** A campaign that promotes free shipping attracts customers who choose by shipping. When a competitor offers the same, those customers leave as fast as they came.
**L2 · Revenue and sales process.** A salesperson who does not know that the real advantage of the company is the knowledge of non-conforming parts sells screws by the kilogram. One who knows it sells the assurance that the customer's structure will not fail.
**L3 · AI Brain, orchestration.** An AI assistant asked about the suppliers in a category describes each company from what it finds published about it. A real advantage written nowhere does not exist for it.
**L4 · Positioning and category.** Everything is decided here. The principle we call the *defensible business model* says the advantage must be built into the way the company works, so that a competitor cannot copy it with money alone.
The second principle, *cognitive ownership*, says that the final goal is for the market to think of the company on its own when the need appears. **A real advantage is the raw material of cognitive ownership.** Without it, positioning remains a promise that a competitor can repeat.
The third principle is the brand as a *foundation for growth*. On a correct foundation, every leu invested in communication remains memory in the market, because it accumulates around the same advantage. How a real advantage becomes an attribute that the company can own is the subject of the [article on cognitive ownership](/blog/cognitive-ownership/).
## How do you test your competitive advantages in 30 minutes?
The test takes about 30 minutes and is done on the list of advantages that the company declares today, in its offer and on its website. For each advantage you go through the four questions of the six-month test and keep only what passes all four.
The exercise has four steps.
1. **Write the list of declared advantages.** You take them from the offer, the website and the sales presentation, keeping the exact wording used. There are usually between five and ten.
2. **Put each advantage in front of a well-funded competitor.** You ask what it would have to do to have the same advantage and how long it would take. If the answer is "buy something" or "decide something", the advantage is claimed.
3. **Look for the advantages you have not written.** You look at the clients you can name, the knowledge of the team, the old relationships and your own capacity. In the three audits above, the real advantage stood exactly here, unsaid.
4. **Check whether the real advantage shows in the numbers.** You compare your margin with that of two competitors, from the public balance sheets. A consistently higher margin is often the sign that the real advantage exists and is already working.
If you find nothing at the third step, the company competes on effectiveness, and that can be a good strategy, provided it is chosen consciously. About the position a company can occupy in the market I have written in the [guide to brand positioning](/blog/brand-positioning/).
The place of the advantage in the complete system of the brand, from attribute to verbal identity, is described in the [guide to the brand platform](/blog/brand-platform/).
If you want to see how your company looks from the outside, on its own public figures, you can [request a diagnostic](/#diagnostic), which gives you a score from 0 to 100 in two minutes.
A real competitive advantage is rarely the most visible thing in the company. It lies in the relationships, the knowledge and the clients you have gathered over years, and the strategic work is to find it, to name it and to put it first in front of the customer.
## Frequently asked questions
### What is a competitive advantage?
A competitive advantage is a difference between a company and its competitors that makes it chosen more often or lets it earn more on each sale. The difference can lie in costs, in the product, in relationships or in the position held in the customer's mind, and it counts only if the customer feels it in the decision.
### What are the four criteria of sustainable competitive advantage?
The four criteria form the VRIO framework. The first three start from Jay Barney's research of 1991, and the fourth, organization, was added later. The advantage must be valuable to the customer, rare in the market and hard to imitate, and the company must be organized to use it. An advantage that fails any of the criteria does not last.
### How to identify a company's competitive advantage?
You start with the list of declared advantages and run it through the six-month test.
Then you look for what is written nowhere, meaning the clients that can be named publicly, the knowledge of the team, the old relationships and your own capacity. Public balance sheets often show where the real advantage already works, through a margin above that of competitors.
### Can you give me an example of a sustainable competitive advantage?
A Romanian example is the collection network of Therezia from Mureș, built over decades, for which the company declared in 2015 more than 1,000 farming families. A competitor can build a factory in two years, but it cannot quickly buy long-standing relationships in a specific territory.
### Can a low price be a competitive advantage?
A low price becomes a competitive advantage only if it rests on structurally lower costs than those of competitors, which they cannot easily obtain. Otherwise it is a decision that any competitor can copy, and the company ends up defending its price in every quote, with its margin.