A motivated, angry, well prepared Rampage is unbeatable for a guy like Rashad who relies on his athletic ability and gameplan to beat guys.
If they go toe to toe and bang, Rashad is going to get Ko'd right away.
If the fight wears on and Rashad can use his superior athletic ability to score points while avoiding any serious damage, he may pull off the decision.
I get the feeling though- these guys really hate each other and its going to be a brawl. If that occurs, Rashad will not win the fight.