Pacquiao- Foot work, Circles, and SPEED!!..
Cotto- Jab, Power, and TIMING!!.
Pacquiao will take the early rounds IMO..by being more cautious..he'll try and get in and out quickly..maybe flurry a bit here and there making Cotto look a lil slow..but Cotto is NOT SLOW!!..that's where Cotto will probably begin to overpower Pacquiao with a crisp solid jab and some early work to the body and slow Pac down a bit..then he'll begin his wrath!..he'll start with some 2-3 hit combos and start upping his pace around the 4th or 5th..and start putting up the pressure leading with the JAB which will be KEY..then the timing will look obvious where it'll neutralize Pac's speed and he'll be getting countered..I got Cotto by 9th round TKO..the punishment will be too much for Roach to bear..and will stop the fight Ala' Peņalosa..
Pacquiao has the tools to also stop Cotto..but I think his lack of quality in opposition while moving up in weight will be his downfall when put in front of a young strong lion like Cotto..but it truly is a pick em fight when you compare the more recent fights and see their results..