i think i would give floyd the slight edge. at 147 khans power is average, just like floyd, except i think floyd could have ko'ed collazo if he was given as many free shots at his chin as khan got.
Don't really know. When is the last time we saw Floyd plant his feet and really try to take an opponent out? Hatton I guess. He had Cotto and Mosley looking like they were ready to go but he never put his foot on the gas. So I guess Khan just by default.
Mayweather. Look at it this way he stood his ground and had Canelo backing up at times with his shots. Could you ever envision Khan doing this? Me neither.
Khan clearly has more power. Would mayweather floor collazo 3 times? I dont think so. Maidana said he didnt feel floyds shots at all, but after khan threw that body shot he said he felt it up to a week afterwards.