Mayweather is not a big welterweight and I think he even started his career at superfeatherweight. Yes he he fought De Le Hoya at 154 but Mayweather was 150 after bulking up. He ran all night and pickpocketed the fight against a past it De Le Hoya. Hatton will weigh more than Mayweather come fight night and is natuarally stronger and more agrressive than Mayweather. Mayweather is probably the most technical fighter ever but fights aren't won on technique alone. I don't know who's going to win this fight but the one thing Mayweather won't do is outmuscle Hatton.