the torque of an electric motor is basically the force/ability to spin the motor (and it's flat/costant )
bigger motor (wider or thicker magnet) has more torque, more autority in our case, in real life = acceleration
top speed is related to kv not to the size of the motor
nikola,msx and monster has the same motor, the same torque, what you feel different dipends on wheel diameter, leverage, firmware and other parameters, but the torque is exactly the same
smaller wheel respond better at lower speed and loose autority at high speed.