How exactly does Pacquiao have a better resume than Mayweather?
From 1995 to 2003, Pacquiao hadn't had a fight with a single notable boxer, whereas Mayweather started fighting named opponents after two years as a professional. That's 38 fights, the bulk of which are no-names/fellow country-men. Past that, you have names like Ricky Hatton, Miguel Cotto, Shane Mosley, JMM, and De La Hoya -- all of whom have faced and lost to Floyd Mayweather. In fact, Floyd beat three of those fighters before they faced Pacquiao.
So who on Pacquiao's resume does Floyd need to beat?
Legends like Panomdej Ohyuthanakorn, Rolando Toyogon, Chokchai Chockvivat, Medgoen Singsurat, and Reynante Jamili?
Margarito, Clottey, David Diaz, Jorge Solis, Erik Morales, etc. are low-profile compared to the great fighters they do share.