This fight should have happened in 2009 when both fighters were very much in the peaks of their careers. Both of them are still highly relevant, but it would have been so much bigger had it happened in 2009. It kinda reminds me of Lennox Lewis vs Mike Tyson which should have happened 3-4 years before it actually did as well.
Anyway, I think Mayweather will win. I think his defensive shell will be too much for Pacquiao to be able to get at him consistently & the longer the fight goes on the more I feel Mayweather will be able to pick apart Pacquiao whom Mayweather described & I agree, as kinda reckless in his attacks at times. Mayweather is much more methodical & won't care if he stinks up the joint, he'll stick to his gameplan & pepper Manny at every opportunity.
I think Mayweather will win by either a late TKO or decision BUT I'm going to put some money on Pacquiao finishing him inside the first 4 rounds as I feel if he's going to beat Floyd that's when he'll do it.