Kongo would beat him if AS stands with him, CroCop no so much. Kongo was K1 fighter I believe and has some of the best hands in the HW division. He also has a decent chin. Almost all his loses were because he has absolutely no ground game. I would love for AS to faint the standup, pull a TD to surprise everyone and sub him, that would be awesome.
CroCop I think doesn't have it anymore to beat AS. But he definitely wouldn't be a long shot, unlike Forrest.
so.. Kongo could stand and trade with him because he was a K1 fighter, But CroCop couldn't even though he was also a K1 fighter, and if im not mistaken one of the top rated K1 fighters to fight MMA when he went to pride.