Best meat protein scale?

Are some animal protein (flesh) better than others?
I was discussing with an Egyptian collegue has insisted that theres an animal protien ranking, with fish, chicken, beef towards the top and pork at the bottom.

Besides the obvious religious prohibitions, is there good evidence that pork is considered a poor quality protein
[*fat notwithstanding-lean pork; lean beef; lean chicken etc….]

ive never heard of lean pork. but yes lean meats usually are the best. (pork and beef don’t regularly exist as lean untill after processing – i think)
Lean meat is just the muscle. turkey chicken and fish are the top choices.