A few years ago, I'd have said Pacquiao. However it now looks like Mayweather is handling aging better.
It's a shame we won't be seeing these 2 greats battling it out at their peak. It will still be a hell of a match and I can't wait for it. I'd be rooting for Pacquiao, but if I were to place a bet, I feel like Mayweather is the smart choice.