I am using waze since 3 years on Jolla, now on Jolla C and can see a small difference in accuracy.

If you drive very slowly and make a turn for instance, the Jolla c needs some additional seconds (maybe 1 or 3) to turn the navigation because apps rely on travelled distance and calculated direction only (my guess).
Sometimes waze can not make out movement changes when gps signal is low because it can not differantiate if its gps fuzziness or you moving slowly.
But the Jolla C performs better overall, i also tested Here, Tomtom and NavFree.
Just because the apps load faster, displayed framerate is higher and i had no app crash as of yet.