I haven't been able to run a single SW-COMP with a magnum motor. On semi auto, you get about 20 rounds out consecutively before the comp overheats. Whereas with a G&P M160, you pull the same spring at the same RoF, and you can shoot semi till you run out of ammo without it overheating
Try keeping track of how many mags you go through in a mini battery, then swap motors for an ICS or G&P and see how many mags you get out of the same battery. From what I've seen in the field, it's typically 2-3x more.