Proteinex vs. Vita4Life: best liquid protein?

Hi, all this discussion on Proteinex has led me to another question that maybe someone can answer. Proteinex is the liquid protein made by Lloren Pharms. Vita4life has their own liquid protein. At first I thought they were the same product, but then I realized they were different. I figured out the cost of a 16oz bottle of Proteinex is $23.00 that's about $1.43 per oz. The Vita4life liquid protein is $69.95 for 72oz, about .97 cents per oz. Vita4Life comes in flavors (honey & mocha). As far as I can tell Proteinex does not offer a selection. ARE THEY THE SAME PROTEIN? DOES PROTEIN GO BAD/EXPIRE? IN HOW LONG? WHICH IS BETTER? It's obvious to me which is better priced, but which one does a better job and/or tastes better? Thanks for all input!

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