Well this is really funny to listen to people opinion, I think this make the whole world more dynamic.
Now look a this thing. Mayweather win an unanimous decision an he is a master, he is the best on another hand Pacquiao wins an unanimous decision and he is mediocre, his performance was average at best.
The only different that I see is that FMJ got us used to cruise to victories why Pacquiao got us used to beat the **** out of his opponents but to fight you need two not only one.
the answer to your conundrum should be obvious to anyone who was able to objectively watch both fights
I saw a rusty, year younger Mosley fighting after a long layoff and an active more physically fit year older Mosley.
I saw a Mosley willing to trade coz he has no respect for an opponent's power and a Mosley who was scared to let go coz he know he's gonna get hit 5x more.
I saw one almost knocked down by Mosley and one that knocked down Mosley.