so, when the track burns out on the S9102's, what are the symptons on the servo?
It will start to jump about (jitter) when you return to neutral.
Analog coreless, versus Digital NON coreless. Which will centre the best?
I'll leave that to someone else---I think you get what you pay for though----better centering, less gear slop, stronger case design,etc.etc.
With regard to digi v analogue, I'd just say that the holding power of the digi,and its ability to go quickly to full power whatever the amount of stick movement, will be felt fairly obviously by most flyers--even if it's only by the way of them feeling "faster" than analogues, whatever the printed specs say.