An elite, deadly striker with a ridiculous clinch game and strong wrestling is a night mare match up for Cain. In comes Alistair Overeem, where Cain won't really be safe in any area the fight takes place in.
He's not safe at distance where The Reem can time him with strikes, he's not really safe rushing in and charging Overeem because he could get easily timed and KO'd by a precise strke from the K-1 champ, and he certainly isn't safe up against the cage trying to clinch take down Alistair, he could eat some nasty uber knees from there.
Very interesting fight, I still think Cain takes it. If he can use his relentless pressure without being timed perfectly by Overeem, then he will likely wilt Overeem early on, break him mentally and also destroy his cardio.