I think Dela Hoya only truly challenged Mayweather in 3 or 4 rounds... the rest of the time he was missing his shots, but if you look stylewise Dela Hoya applied the exact same pressure Castillo did which made them harder to hit, but they still applied distance pressure while not throwing as many punches until Mayweather was on the ropes. Hatton throws punches and uses body to body pressure and that will either make this a good fight or because he is open to getting hit(less so by hard punches) Hatton might get picked apart(which is unlikely) or he will wade through the punches and give Mayweather one hell of a fight(more likely)... I dont' see this being like Duran-Leonard as Oscar put it, but more like Frazier(with less power but more speed) vs Ali(with less of an offensive arsenal but better defensively)