What size would be better for a banshee with TR6s and stock gearing the 20x11x10 or the 20x11x8?

 

I have a set of 20-11-10 dirt devils and a set of 20-11-10 sand sharks, I like the 10 inch rims better because there is less tire roll. At least thats how it works on the dirt so i figured it was the same way in sand.