If Neymar was already doing things people couldn't at age 3, then we could argue about this but since he was still wearing diapers just like everyone else at that age, he was just a normal kid who loved to play football. Im pretty sure he didn't do anything than playing football between 5-20 and even in this day, he still does so he definitely has the hours and wasn't born with it. Technique can be only trained and since he wasn't doing anything special at age 3, he had to put the hours to have that technique and if im saying Ronaldo is far ahead technique wise, there's no need to bring any of that "relaxing out" stuff out because even if it was true, it still doesn't make Neymar more technical than Ronaldo because it's not some kind of equation where you add something, then you divide it with something and then you have a compensated result, it's all on the field and that's the truth. You could have said, Neymar could have had higher potential to have a better technique, then it would have been correct way of explaining it, but even then it wouldn't have been nothing but a pure speculation. If anything, we could talk about genetics a.k.a talent but even then, Ronaldo is far ahead when it comes to speed, explosiviness, game IQ, injuries etc. and most of those things you can't train, unlike technique. Then there's dedication, motivation and mentality etc. and it's just something GOAT's have on any sports compared to the normal players and it cannot be thaught/trained either, so even there Ronaldo is far ahead of Neymar.
So final conclusion is that Ronaldo is superior athlete, he has better genetics and by the hours he put it, means he has better technique as well.