Only anyone who has ever done any sort of sports training will disagree with you. Where's the speed in Diego's legs? Where's the power. There's a lot of muscle there, no doubt, but is it making him faster? And why does he run like that? He's always hunched over. Ronaldo's power comes from his hamstrings and glutes. Compare Ronaldo's muscles there with what Diego has and Ronaldo's by far stronger. I'm not saying that this means this is what Diego should strenghten, but it's quite obvious that Ronaldo's a better athlete. Maybe copying doesn't hurt.
@ the guy who asked me if Buffon wasn't an athlete: when I saw him play live in Bologna I immediately noticed the way he ran. It was nothing like the way he ran in 2003 for example. He moves very differently. Look at some footage if you will. It's almost as if he's got Trendelenburg. At this point right now, Buffon is less athletic than you and me I'm afraid, but the surgery should help.