Cotto has a good variety of punches and a much improved right hand compared to early on, he moves well and uses angles, he'd stop Khan and early at that, around the 4th or 5th, I haven't seen Khan do anything that would give the impression that he'd be able to beat anyone above 140 (that is worth mentioning) much less a guy who is solid at 154, shit a fight against Provodnikov at 147 would be a toss up for Khan, and he has nowhere near the skill or IQ that Cotto has in the ring