hobbywing ezrun 150A vs Mamba monster

[BrianG]

So, at first glance, it looks like the MMM/2200 combo is slower on the same voltage?

I would try to isolate where the difference is:

First, run the same motor/voltage/gearing/vehicle with different ESCs. If one ESC is faster that the other, it could simply be transmitter calibration. If both ESCs yield the same speed on the same motor, then it's a motor kv inaccuracy, or maybe one rates theirs unloaded, while the other rates theirs at an arbitrary load.