Arm

Horses for courses. Both great. I've used a rotrex sc for years and it's very easy to setup. At low rpm and little boost it acts like a nat asp. Around 4500 rpm engine wakes up and power curve climbs in a linear fashion more quickly than may asp. Then stays linear to your max revs. Doesn't usually tail off. Not getting into turbo or sc argument. Both great and both have a place. Have done both and sc very easy to get running well.