Who else have you heard beat Floyd in sparring? Other than Zab knocking him down recently lolol Floyd likes to tell everyone he beat Pernell in sparring so he can't have it both ways.
Surely you have to factor in one was a few weeks out from a fight and the other wasn't, one was starting to peak performance wise. Just heard story of lesser fighters getting the better or higher rated fighters that makes me think you can't judge anything based on sparring.