I tried multiple Methods.

Studded tire on front only.
Swapped studded for mountain as roads cleared.

Front and rear studded.
Swapped front studded for mountain as roads cleared.

External geared motor on rear wheel, so swapping was too much of a hassle.
My method-objective was to keep the best traction on the front, for any weather condition.
Rubber does better on any non-iced surface.

Finally settled on 2nd eBike for better conditions, mountain bike treads, best for "dry" streets ... with the occasional sand residue on curves.