i don't own either of those helmets, so therefore, they must both be absolute junk jk, but i do have: OGK FF-4, Arai Vector, Shark RSR2 and they're all excellent helmets. well made, lightweight, good venting. just make sure you try them on, and pick the one that fits on your head the best, as well as making sure it feels good when you move your head up, down, sides, etc. then, throw yourself from a moving car at 75mph, tumble around a bit on the road, and see which helmet gives you the least concussion like symptoms.