Brand name vs. brand quality

From time to time, someone will do a comparison of "quality" between a brandname product and a generic. There will be some examples wherein the generic beats the brand name.

In a post titled Taste Test: Store Brands vs. Name Brands, consumer reports found that Food Lion chicken noodle soup "beat" Campbell's:

These soups have soft, almost mushy noodles. Food Lion's flavors are a little more intense, the dehydrated spice taste is not as pronounced, and the soup doesn't leave as much of a fatty feeling in the mouth. The Campbell's broth is oily, with fatty pieces of chicken, and it leaves a lingering taste of garlic powder.

At the end of the day, the trademark holder has to maintain product quality.