Here they are: 1. Floyd's defense was better than Roy's. 2. Roy had a china chin. Problem is, one of these claims can't stand: If his chin throughout his career was as bad as many of you would have us think, than his defense must have been utterly phenomenal, no? Indeed, he must have avoided being caught cleanly even less than Floyd has. Therefore, his defense (unconventional as it was) must have been better than Floyds. If you don't believe this, then you are acknowledging that his chin was better than many of you argue. So when arguing head to head, I don't think its fair to use both defense and chin to argue points for Mayweather above Roy.
Really downsize RJJ and put him in with: Castillo @ 135 Chavez @ 130 Judah @ 147 Delahoya @ 154 GUESS WHAT? RJJ whips them all more impressively than PBF if he was the same size than PBF. RJJ wouldn't lose a round against those guys if he was PBF's size. PBF lost over 35% of the rounds against those fighters yet RJJ would lose less than 5% of the rounds against them and score more KOs into the bargain