well theyre all owned by kroger, i understand theres like a heirarchy to it though
like up here qfc is probably the most expensive / sell the higher quality groceries. fred meyer is the same but sells some cheap foods too, and is way more than just a grocery store, its more a retail store than a grocery store, but they have high quality shit you cant get at a low end grocery store
i imagine they market different goods to suit the customers of a particular chain they own