The demon drive will feel different than the DW because it is a direct drive, i.e. no chain. It will feel more like an accellerator cam. The DW cam is adjustable to feel like accellerator, concentric, or anywhere in between. If your plan is to set the world on fire with raw foot speed, the Pearls can do this for you. But so can the DW. From a financial standpoint, the DW wins. From an adjustability standpoint, the Pearls win. The Pearls also offer long/shortboard option, the DWs do not. They really are two completely different monsters. It's kinda like comparing a Honda and a Ferrari. In the long run, they are both cars and perform the same operation. They each have their strong and weak points.