RE: Licensed pilots vs No experience
You just answered your own question.
IME from having been a dedicated aviation 'junkie' for as long as I can remember and subsequently professional for 30 years plus rated instructor in both genres, it depends entirely upon the attitude and demeanour of the individual.
Arrogance, regardless of the studs background, will impede lesson assimilation.
Generally, a competent qualified pilot makes a better RC student and has the potential for faster overall progress. The biggest asset or liability to rate of acquisition of the pre-requisite co-ordination skills required in RC however, regardless of background, is age. Being a natural sportsman with good co-ordination is another.