Manny's southpaw stance would have given Mayweather fits, like Judah's did but Manny wouldn't run out of gas after 5 rounds. Pacquiao is as also alot younger and (arguably) in his prime.
No it's the other way around... I can seriously see a Pacquiao-Mayweather fight possibly being a complete shut out for Floyd and everyone being all disappointed and sh*t... the Mayweather-Mosley fight, not so much