I have the comp radio also, but those adjustments are for end point travel and a few others. With the digitals you can actually program the speed and torque. It's not a mandatory thing, it's extra, but the program gives the guys with the over $1000 planes, infinite control over each surface. Slow and realistic scale speed for the up and down on retractable gear and things like that. I'm not sure if they would have an advantage over a good high speed, hi torque standard car servo.