I think Mayweather would win on all accounts though it would be clsoe with Mosley up until his forrest fight. But Mosley would have alot of trouble with Mayweather's movement because he looks to throw combinations or did at lightweight before anything else... Mayweather has a little better timing which is something that WInky also used to give Mosley a hard time. That being said I could also see Mosley beating Mayweather becuase he was/is fast, strong, and a warrior.