Honestly, It has nothing to do about brand.
Its all about fit, Ive gone down in both scorpion and arai's.
To this day i think about how different one wreck would've been had it been something else. Each model fits different, its about what fits your head best.
The best thing i ever did, was go to a hat maker and they put a hat on my head, that then punched holes in a piece of paper that showed the shape of my head.
Get this done, im telling you it will make all the difference in knowing what helmets to try vs not.
It amazes me, how someone gets use to the feeling of a helmet that wasn't designed for their head shape, but its all they know. so that's what they stay with, and a proper fitting helmet feels to tight or pressure points are moved to different spots on the head.

Tyrel