Finding the best vane for you arrow set up can be an absolute chore there are so many types and styles and things to consider and what it comes down to is fletching up 3 of all the types and styles you want to test and shoot them, shoot them inside, outside, in wind, your self , shoot them with...
I've done it both ways and it doesn't make much difference. Keep in mind I'm not a target archery guy so my experience is within my shooting limits.. That being said I have a touch of ocd so I shoot my arrows bare shaft and fletch the direction they want to spin.
Only time I think it matters is if you’re running a single bevel head.
Here’s a video Paige Pierce did which really throws a monkey wrench in the whole process of “clock tuning” shafts