Crabby, havent heard from ya? Whats up? To anwser your question, the e-motor is a better motor as far as weight vs. horsepower, the e-motor is lighter by far then the gpu. And is a true aircraft motor, if you get one, get one w. a standard regular crank, not the spline crank. I onwed an e-motor w/ 0470 angle valve cylinders 250-260 horsepower and it was a good motor. I would get the e-motor b/c you can put 520's on it down the rode, and have a good true aircraft motor. As fair as parts, I wouldnt say the e-motor has more parts, there are alot of gpu parts, but if you get a good e-motor you shouldnt have to buy many parts.