uumm, im a floyd fan and i say whittaker. floyd isnt there yet but if he beats pacman he may very well surpass it.
Actually ive rooted against these guys in most of their fights and im leaning towards Mayweather(just barely).
Floyd's best wins: Castillo, De la Hoya, Hatton, Mosley Pea's best wins: Ramirez, Nelson, McGirt, Vasquez I still rank Whitaker a bit higher. It is close.
In terms of analyzing styles etc, i maintain that Whittaker has the edge in terms of versatility, ever so slightly. That said, if i'm brutally honest, Mayweather might just be better. It's that close.