Seeing as Floyd is too scared to fight Khan, I'm sure Pacman will take Khan on if he gets a chance next year in Dubai Bob arum said, so who'd win the bout?
The Con man has a better chance than most would admit Nap man is shot and hasn't impressed in a while
The same thing that happens everytime someone other than Marquez, Morales or Mayweather meets Pacquiao. Beat up, outboxed or knocked out. Pacquiao catches Khan between punches just as he did when he sparred him. Pacquaio either stops him in 6 or it goes 12.
As much as I get annoyed with Floyd at times I would never say he is scared. As for your question Both Pac and Floyd can K.O. him. Pac early. KO within 5 Mayweather a little later ...although a well placed counter might end things at any time. KO in 10. Or a comfortable UD.
There is no point in Con fighting either of these guys. Waste of time and would easily get KO'd. Instead, he should rematch Maidana and see how long he lasts.