I'll reserve judgment until after this weekend. I want to see how Kats does with Chavez. But if Kats could pressure Juan Diaz here and there, I don't see Khan being able to run from him for twelve full rounds. With another year of training and seasoning maybe, but not if they fought tomorrow.
Katsidis is not as skilled as Khan but he is so aggressive that he will eventually land something big and proceed to stop Khan once he has him hurt. Khan would probably win if the fight went 12 but I doubt he could dance that long. Katsidis came very close to taking out Casamayor, who is a much better fighter than Amir. I doubt Khan could come back from those shots Casamayor took.
If khan fights smart and not get into a brawl then i can see him winning by UD or TKO. He is a fast and can outboxed katsidis but he has to be careful cuz katsidis got knockout power. If the fight go to scorecards then i can see khan winning this fight.
Khan would likely have the skills to outwork Katsidis at range but he has a big heart and keeps coming, so theres a decent chance of him stopping Khan whilst behind on the cards.
i think both are on the same boat and in the same level, both would do good for each other. its a hard fight to call though but i think katsidis would spark him out in the late rounds