How to grip a curve

ok my curve ball i grip like this, ok i get the seams into a U sorta formation and i do the usual grip but ive watched vids and it tells u to makes the U a n instead. and my curve works great, but witch one should i use.

In my opinion it’s whichever one feels more comfortable. I fiddled around with both the u and the n, and the u felt more comfortable so it had better control and better break.