Your offensive tactic is going to affect your teams crispness and offensive execution. So playing Normal is Normal whether you are 4 or 12 enthusiasm. Your enthusiams is going to affect your teams defense and rebounding....So you play Normal at 8 enthusiasm against his crunch at 5....Its your 8 defense, against his Crunch offensive effort and your Normal offense against his 5 enthusiasm.'
So the question could have a variety of answers....if his offense sucks, it will suck a little less with crunch....if your defense is bad, it will be better with the 8 enthusiasm....if playing straight up your defense is better than his offense...I would take your 8 enthusiasm and the better defense against his crunch effort.