Warren Buffett on competitive advantage

We say a lot about the role of strong brands as competitive advantage. Just look at the view of one of the great investors in the world, Warrent Buffet, about this topic in the article "Brand names - Warren Buffet secrets". In his opion, there are two types of companies: commodity companies and non-commodity companies. Commodity ones produce or sell the undistinguishable products/services to others. In contrast, uncommodity companies produce a product or service that is so different from its competitors, or so special, that the customer, and the distributor, cannot do without it. This allows the company what Mary Buffett and David Clark call a "continuing competitive advantage".Brand name is one of important tool to build continuing competitve advantage. In this article, he also gave example about some strong names such as Coca Cola, Gillete and three brand name advantages. For further discussion, please take a look at this article.