Simple really... Which fighter of this generation do you think has the most "elite wins".
For me, an elite win is defined as "a win over another elite fighter, in their prime and at both guys' favoured weight."
By my estimation, Pacquiao has seven (Morales, Barrera, Barrera, Marquez, Cotto, Bradley, Bradley), while Floyd has four (Hernandez, Castillo, Castillo, Corrales).
Borderline wins are Clottey (for Pac), and Mosley (for Floyd). These are up for debate really.
I don't consider Hatton or De La Hoya to be an elite win for either, nor Marquez or Cotto for Floyd.
I open it up to the floor!