Just because the test standard is different, it doesn't mean that the helmets are different. As far as I can see the construction of each type is identical and they use the same materials. They're probably made in the same factories with the same methods. Most of the protection comes from a simple expanded polystyrene moulding that has a thin plastic shell to make it look nice and resist puncturing.The snowboarding helmets wrap round more, so give better protection, plus, you don't have those stupid protrusions front and rear that knock your helmet off your head in a crash. I know which one I feel safer with!