I have driven both engines.. i have to say the Picco P3 is way more motor.. thing is nutty on the bottom and i can get better milage out of it.. My truggy was pulling wheelies when you hammer the throttle hard going into a straight. The Jammin is a little smoother of power delivery on the bottom but then screams when you hit the high end of the RPM range but tends to be a bit harder on the fuel. But with the cost factor added in the Jammin would be of the better bet.