Whey builds muscle fast, steak has more vitamins, collagen fixes joints, and ground beef does all three.

Whey protein but not collagen peptides stimulate acute and longer-term muscle protein synthesis with and without resistance exercise in healthy older women: a randomized controlled trial.

The Effect of Leucine-Enriched β-Lactoglobulin Versus an Isonitrogenous Whey Protein Isolate on Skeletal Muscle Protein Anabolism in Young Healthy Males

Comparison of the effects of commercial whey protein and native whey protein on muscle strength and muscle protein synthesis in rats