Cotto-Pacquiao: Who Wins? Why? And How?

Ok since Bob Arum said that if Cotto goes thru Jennings this Saturday, and wins next June, and Pacman wins against Hatton, he'll try to make this fight happen at Welterweight. I mean, lets be real, the chances of at least Cotto going thru any opponent that's NOT margarito at welterweight are pretty high, he already beat and knows how to beat Mosley, and Cintron/Berto would be underdogs for a June showdown, let's say he does win those two fights...and pac beat Hatton...that would make an amazing fight of two prime fighters, a true dream match, unlike the Oscar letdown. a fight for pound for pound #1. Who wins? I say Cotto. Not because im puertorican because I had him losing to Margarito since day 1, im no nuthugger, but Cotto is just a very strong welter, in his prime, knows how to box and beats people down in a very dramatic fashion. I just dont see pac, with his really small frame, cuz cotto is a small welter that makes up the difference in his amazing power. I see pac maybe hitting him a couple of times because of speed, but pac has been known to eat a lot of punches at other weights and Cotto unlike oscar would not go to the ring and not fight, Cotto would give him hell and i really see pac not making it 12 rounds, the pressure is just going to be too much, i see a zab judah fashion beatdown in possibly the runner up for best fight of 2009. So what's your pick, why and how?