As Larry said, Shane no longer has the legs he once had. Shane doesn't throw that many straights. He is a speedy brawler with really good power but has 0 adaptability. Shane simply can not adapt. He faught the DLH rematch as he faught in the first fight, reason why he lose. He did the same against Winky and Forrest. Mayweather will win and make it look easy. He will beat him in another masterful performance, where haters will scream boring.
Mosleys winging right hand is the reason i think he has a chance in this fight. Floyd can be hit with a right hand high on the head, and he would have to move into shanes range to hit him.
I'd pick Mayweather to win this one. If Floyd used his jab as much as he did last night then I think he could outbox and counter Mosley to a 12 round decision.
Mosley gives up everything with the exception of perhaps power and a more proven chin. Power - Mosley Chin - Mosley Technique - Floyd Hand Speed - Floyd Foot Speed - Floyd Accuracy - Floyd Ability to adapt - Floyd Just remember, Cotto was picking Mosley to pieces until his questionable stamina hit him late and Mosley started to come back. Cotto is no where near the boxer that Floyd is.
He found sucess using the same style. That's the problem, he came in with the same game plan. He can't adapt during a fight/ change it up in a rematch.
Let me say this, if Cotto was able to outbox Shane. The MUCH better boxer in Mayweather wouldn't be able to do the same?