Differences in proteins

Victoria Milk Protein = Milk Protein Concentrate
Milk Protein Concentrate = 80% Caseinate, 20% Whey Protein Concentrate

Both Membrane Micellar and Aussie Caseinate are straight Casein proteins (ie no Whey included) ... the main difference between the two is that the Aussie is instantized and the Micellar isn't.

Premium Whey 5lb is whey protein concentrate (lactose and fat included) while the Whey Protein Isolate is almost a pure protein (practically all of the lactose and fat are filtered out).