Nobody Beats him. I don't care which version of Cotto or Margarito you throw at him, he finds a way to beat them all. I love Paul Williams, but he would sharpshoot Paul all night ala the first Quintana fight. And Shane would lose a UD becasue he would not be able to load up power shots on PBF.
Actually, it's pretty obvious Floyd and Cotto would fight their own fights, Cotto would operate going forward and Floyd would go backwards and counterpunch. I see Cotto taking a good few rounds from Floyd, I really do. 50/50 fight, maybe a slight advantage to Floyd on experience. Would be one helluva fight either way.
Any of these guys could beat UBF, but out of any of them PW?... I do not know my friend... Remember, PW got outboxed, outclassed, or whatever you want to call it by Mr. CQ during 12 rds of masterful boxing schooling to him.. I don't know how he would perform against a faster guy in UBF... I DO KNOW Cotto WILL find Mayweather @ some point, and when he does... good night, lights are out. After that Mayweather will be rememberd as a very good fighter, just below 147...