They also know that there are several brands of the same product. But consumers do not have to focus on the difference that much. If the brand does not matter.
They also know that with the same type of items to choose from several brands, but consumers do not make much difference. If you buy wrong brand doesn't matter.
It is also know that there are many kinds of products, select Same brand, but consumers are not important to the difference that much wrong if purchased brand, it does not matter