Floyd can fight Canelo, Martinez, Trout etc... but he couldnt or should not have fought Marquez, Clottey or Ortiz.
at the same time Pac can fight Margarito, Clottey(even thought they are "bigger") and whoever he seems to have an advantage over and get huge credit for the wins.
( you say well because of size.) But Floyd cAN FIGHT pAC....
But if we say Pac should fight Canelo, Martinez, Trout.....This is absurd and out of the question?
On the same note Cotto can fight all those guys too and its no problem( a fighter Pac fought and beat).
For me the answer is...Whether you hate Floyd or love him your giving him respect because inside you know he is great or greater than Manny.