No, he would not have beaten Aaron Pryor. He would have been competitive, but Pryor was too strong and very skilled in his own right. He would have cut off the ring and outworked Floyd. The pressure and punch output would have made Floyd get out of his rhythm and Pryor would have been more content with the situation than Floyd.
I have never seen so many excuses in a group of people before, i personally cant stand mayweather and i was going for hatton but damnit give mayweather credit. The guy is a hell of a boxer.