I think Pac. But it didn't happen. When it eventually did happen, we all saw what occured. So I will forever rank Mayweather one place above Pacquiao p4p. Shame. Anyway, as time goes by, I'm thinking Mayweather was indeed the greater fighter.
Same result. They are in roughly the same bracket in terms of quality. But the style and size advantage would have always been too much for Pac to overcome.
No different than the 2015 fight except it would have been slightly more intense and fought at a a faster pace. Those who say Manny would have been younger, faster and closer his prime in 2009 well the same applies to Floyd.