Umm, we have to go back to that ancient era of May 1st, 2010. Mosley's always done well countering in the exchanges. He likes that type of fight more than a tactical boxing match. He likes a brawl, and does a lot of work through effective counterpunching. He may not be Marquez-level at countering, but he's effective at it.
he fought a good one in jmm but jmm was the one to push forward all night long so his style was useless. he was the pressure fighter that night being the small man that he is.
Both of them have fought opponents of various styles, but to an extent it's true. Mayweather hasn't faced a southpaw as fast of foot and hand, active with his hands, who has such an offensive arsenal as Pacquiao. Pacquiao hasn't faced someone with the combo of technical skills, slickness, intelligence, size, etc....as Mayweather. You can pretty much say things like this whenever you get a matchup between two great fighters.
Will be interesting to see how emmanuel reacts when he's in the ring with someone who's bigger AND faster:think