Against Robinson I think this fight could really go either way, but Robinson would be a heavy favorite. THe reason is that we don't know how Ray would have delt with speed that matched his own, and also the combinations he threw wouldn't be able to land on Floyd because of the angles he used, and just because combinations don't land on Floyd. One thing both Leonard and Robinson would have an advantage at is that as Mayweather has moved up he has used less and less footwork and I think they would capatilize on this because when he pot shots Mayweather is a lot easier to read what he is going to do offensively. However the reason I think Floyd has a shot of beating RObinson a few times at WW is because Robinson is so easy to hit(for a pure boxer) sometimes I would wonder how he is one of the greatest all time, until he would go on an offensive fury consisting of 10-15 brutally hard punches, but both of them threw wildly when they threw their combinations and I think once Mayweather got used to their speed, if he lasted that long, he would started getting countering them hard enough to earn their respect. Now people are going to say they both had indestructible chins, but Robinson's chin wasn't as good as it was at middleweight and psychologicall it helps when you can return the fire, but once he found that he couldn't hit Mayweather very easily to would interesting to see how Robinson would go on from there, either he would just go on an offensive rampage for the rest of the fight and win through pressure and the occasional hard punch landing or he would try to box on the outside with his height and might lose because Mayweather has the better defense.