Ok here is a graph with the Ammo on the same 14/65 gear set, only other change was I went back to low start power on the ESC.
Even though the motor is running well outside its comfort zone it was putting down big power, at least 5mph faster than the Medusa, more torque, it's like it's a much higher KV motor. I'm going to gear down till it feels close to the same speed as the Medusa and see how the temps are.