Does a harder outer shell always mean that the helmet offers more protection ? I don't know http://www.motorcyclistonline.com/ge...helmet_review/

Even assuming expensive helmets are always better, are you sure in case of accident, the supposed "extra protection" of the hyper expensive helmet plays a role ?. I am not confident at at that in case I had an accident and managed to destroy the S4, an Arai would make the situation different. The rest of injuries would probably bad enough anyway. I am not a helmet expert so this are just personal thoughts

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