Who's the harder puncher?

Mosley, he also has power in both hands

cotto might be a bit more heavy handed, not sure though. mosley is way more explosive though, much more one punch KO power.

Margarito took Cottos best shots for 11 rounds straight, Counter punches he wouldn't even see, Punches that landed flush. He lasted 9 rounds with Mosley and by the 8th round the fight should've been stopped!

They have a shared opponent in Margarito, and I don't think I have to tell anyone what happened there. Mosley at 147 is a big puncher, noticeably bigger than Cotto. Shane is the bigger puncher. But this theory doesn't work every time. Shane and Pacquiao share a common opponent in Cotto, but just because Pacquiao TKO'd Cotto doesn't mean he hits harder than Shane.

Mosley by far. Cotto is a pretty hard puncher but I think Mosley has more destruction in his punches than Cotto.

Shane Mosley

I think Shane is

mosley by wild rain of hell

Kinda hard to say...I mean as much as Pacquiao dominated Cotto, he was still bruised up like he just got TKO'ed in 5 rounds by Cotto. I guess I'd say Mosley. He lands the more effective punches but that could be because of the accuracy from his good handspeed.

its got to be mosely

Mosley has one-punch KO power, whilst Cotto has the heavy accumulation thing going on.

Definitely Shane. Shane loads up more, he generates more leverage. He had Cotto going backwards and in trouble late

They have a shared opponent in Margarito, and I don't think I have to tell anyone what happened there. Mosley at 147 is a big puncher, noticeably bigger than Cotto.

Mosley imo. It's kinda close though.