Mike, You are absolutely right about acceleration and power. The Aventon 500 is quite a bit stronger than the Ride1Up City. Tested both on the same hill. Aventon at PAS 5 went up at 28-29mph with strong pedalling. The Ride1Up at PAS 9 could only manage 21mph with similar pedalling effort. On full throttle the 500 hit a little over 20mph while Ride1Up managed 17-18mph. I imagine with better tires (higher pressure less rolling resistance) the 500 could even do better with less pedalling.True - the R1up has slower level 1 and 2, but that is due to lower torque. It just cannot accelerate as fast. The difference is on hills where the Pace stands out. By the way, you can control the top speed in level 1, by adjusting pedal cadence, by choosing the right gear. Amphour rating has nothing to do with speed and is the capacity of the battery determining range.