Servo motors are smaller and lighter than clutch motors and are, therefore, more portable and easier to install. Clutch motors run continuously and use more power as a result. By contrast, the servo motor only consumes power when you engage the foot pedal, so if you leave it powered on but you don't work the foot pedal, there's no power draw. As a result, you enjoy power savings of up to 70% or more. You can control the speed of a servo motor either by varying the pressure on the foot pedal or by adjusting the control button so the motor runs at a specific speed. Once you set the speed, it remains constant even when you press hard on the foot pedal; the only way to change it would be by resetting the speed control button to the new speed at which you want to stitch. Lastly, servo motors are quieter than clutch motors.