From the spec sheets.. The digital maintains closer to zero deadband due to the pulses. As far as torque to the servo.. It's no different then taking a AA battery and hooking it up to a toy truck motor. Then taking a 9V and hooking it up. The 9V will make the engine go faster and stroger. The spec sheets telling me that the torque increase is simply due to the constant current draw when the servo is in use.