Could someone with experience on the technical side of the industry (not marketing or astroturf) tell us if "one drive of each brand" applied to a dozen pieces

Could someone with experience on the technical side of the industry (not marketing or astroturf) tell us if "one drive of each brand" applied to a dozen pieces of hardware is a dozen different brand stickers attached to the eventual output of the same NAND chip foundry, or is it realistic that its really a dozen foundaries? Fundamentally rewrite testing does not test the physical parameters of a brand name sticker, it tests the physical parameters of one kind of IC cell. I would not be entirely surprised to hear there are very few foundries making this exact type of IC but I can't estimate how much larger or smaller than number is relative to the much more well known number of brand name stickers. As a message to the marketing people I excluded in the above paragraph, I would be willing to pay a modest amount extra money to have the honest foundry name on the marketing material for a drive, and lets be honest I'm only going to buy multiple quantities of your product if I can order from separate foundries so please don't lie and also please give each foundry a different UPC code or something. Somehow I get the feeling this will end up like power supplies where "everyone knows" there is one model of supply and stacks of different wattage stickers applied to the same device to maximize revenue. The market is too corrupt and unequally informed for this to happen. Still, a guy can dream.