I have just bought a Pro Connect Alfine 8. I tried the Endeavour S10, and the Pro Connect 10. The Endeavour goes like a rocket but has a very limited range. It is also technically illegal on the road. The Pro Connect 10 derailleur gear changes are a bit clunky and tend to crunch from time to time. The Alfine is very smooth by contrast. The Pro Connects have an enormous range. I did 20 miles the other day on full power with lots of hills and only a small percentage of battery showing as used. In general terms the Pro Connect and the Endeavour are very similar, frame and spec wise, if you ignore the motor.