GSP would mix the take downs and striking beautifully like he always does and win a comfortable decision. Rory could stop him but he usually does that by ground and pounding the other guy and I don't see him getting top position for long in this fight.
I'm gonna start this by saying I'm a HUGE Rory Mac and GSP fan. That aside your out of your fucking mind!!!! GSP will take Rory down at will and will work his gnp for 5 rounds for a easy UD. Now maybe in 5 years when gsp gets the BJ disease if he does wich doubt he will, but not noway no how right now gsp dominates him right now