Pac vs PBF would be the bigger fight. One of the main reasons why it will bigger then Cotto vs Pac is that PBF will be the bad guy again and alot of people want to see his mouth shut once and for all and I'm sure 24/7 will play it to a tee. Plus all the Mayweathers will be talking smack toward Freddy Roach again. Controversy sells and Pac vs Cotto will not have that because both are very humble fighters. The only reason that Cotto vs Pac would sell is because both have huge followings in there countries. And Pac vs PBF will place the best offense vs the best defense etc.