as mentioned, Digitals centre, move more accurately to commanded position and hold that position more accurately (without hunting) than analogue servo's.

On sport planes I use analogue (Escapade)
On my 46size Extra I use to digitals on the ailerons (digitals are generally also faster than most analogues) and rudder. I don;t bother with the elevator because the plane is so responsive to elevator input that a digital's performance is not even noticed. I use JR 591's for elevator.

On my Pattern aerobat I use digitals all round, except throttle where i use a simple cheap Tower Pro analogue.
for my pending Pilot Rc Edge 540 i'll use digitals all round
For the pending Focke Wulf Ta 152H I'll use std analogues all round.

basically for scale warbirds or <.60 size sport aerobatic planes, std analogues are good enough.
for anything that pulls high G manuevres and requires precise orientation, e.g Knife edge flight, 3D, pattern, IMAC, hi torque digitals are the way to go.