Our lab examined the effects of supplementing with whey or meat-based proteins over an 8-week training protocol. Whey and beef protein produced similar gains in lean mass while chicken protein lagged behind somewhat. Beef protein appears to be the best choice for individuals with milk allergies.
Sharp, M., Shields, K., Lowery, R., Lane, J., Partl, J., Holmer, C., … & Wilson, J. (2015). The effects of beef protein isolate and whey protein isolate supplementation on lean mass and strength in resistance trained individuals-a double blind, placebo controlled study. Journal of the International Society of Sports Nutrition, 12(Suppl 1).