I know I should prefer Whey Protein Isolate, but I don't understand why people buy these "premium" protein powders for 50 dollars more than a cheaper "whey protein concentrate/isolate mix". I mean whey is whey isn't it? I've noticed absolutely zero difference between very very expensive whey protein and cheaper protein. I just read the ingredients and if they aren't gipping me by putting in soy protein or other knock off shit, but if not..I don't see the big difference.