Originally Posted by Doctor Morbius
Genetics. I know which I'd rather be ... and it ain't Tyler Hamilton!

I'd rather be Tyler Hamilton given a choice between the two body types.
Photos of bodies can be very deceptive. That photo is from the 2003 TDF at the end of a brutal stage. He looks much better in other photos even from the same tour.
The muscle men just have a bunch of useless muscle mass that doesn't actually do anything interesting except "flex" for the camera.