Why bring up Calzaghe? He's asking between Mayweather and Pacquiao. The universally respective #1 and #2 in the sport.
That said, Mayweather. Bigger name opposition, undefeated, multiple time Champion in multiple weight classes. If Mayweather were still able to make 130lbs he'd murder Pacquiao. All Pacquiao has in straight-forward aggression (which I'll admit, is pretty ****ing awesome to watch) but Hatton showed what straight forward aggression gets you against Mayweather.
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