No need to give a long story. Manny Pacquiao hits air all night long but a few ooh-and-aaah moments hitting Floyds temple. Floyd shafts him with right hands down the pipe all night long and wins a decision. If Mayweather gets tagged like he was against Mosley, Manny probably knocks him spark out.
Floyd's too skilled and can fight in too many different ways. Manny can fight one specific way and we've never seen him have to change it up when things aren't working out. JMM was able to give him alot of trouble and Manny was lucky that JMM liked to trade punches because if JMM were more disciplined in his boxing he would have won both fights. Floyd takes it in a 12 round UD.
50/50 fight. Both have the skillset to beat each other it really comes down to a lil bit of luck and whoevers night it just happens to be.
I think Floyds biggest problem in this fight is his chin. He is very suspectible to getting hurt, and when he does get hit clean he freaks out and covers himself up. Pacquiao is going to hit him and catch him with stuff, and Floyd could be in big trouble in those situations. Other than that I think Floyd has the ability to outbox pac, but I find him to be a bit too flat footed and stationary on the defensive which could also get him in trouble. You need to move against Pacquiao and Floyd is not a mover, he's likes fighting you right up front or in the pocket.
If Floyd fights on back foot and avoid being cornered then it could be a split decision. If Floyd fights the way he fought Mosley and Ortiz, he'll get tagged and clobbered eventually.
Luck or ring IQ? I think intelligence will play a very important role, so you know who`s gonna win then.