We buy a fair amount of "Great Value" store brands from the local WalMart....mostly household cleaning items, etc. When I was working, I made several trips to the WalMart headquarters in Bentonville, AK, and every morning the "Brand Name" salesmen would line up at the sales area, to sell their products to WalMart. Since WalMart bought in such huge quantities, the consumer price was always substantially lower....for the identical product....the Only difference being the Name on the product .
Sam's is all name brand..You can buy Sam's Brand Cola at Wally World but not at Sam's!!!