I initally stated that Servo may be a waste of $ since Servo is Standard on all BMW's w/ EPS except the X1 so I assumed that all EPS has Servo software since it virtually cost them nothing. Now that I've drive sDrive w and w/o Servo, I'm pretty sure the software, at the very least, is different w EPS steering. The steering feels pleasantly heavier at all speeds, thanks to the Servo. The steering in the non-Servo sDrive was way too light.
Can anyone share similar observations?
My suggestion is to try the non-Servo sDrive to see whether you prefer heavier steering before electing Servo. Servo EPS steering is not too light, though I'd prefer even heavier, and pretty close in effort to an HPS system w/ Servo.