I think 9/10 times Khan beats Maidana, but his chin is always going to be a massive question mark and if Maidana hits him clean he will hurt him.

Regarding the Corley fight, I watched part of it in between watching Calderon-Segura and UFC 118, but it looked to me like Maidana just didn't take him seriously as an opponent. He was sloppy, inaccurate (even more so than usual), and looked like he expected to just walk all over Corley. I expect it was just an off-night, though I don't rate Maidana as highly as many people seem to, but I'd expect him to look totally different against Khan. That being said, I still think Khan is likely to beat him.