Bell helmets

Does anyone know what the difference is between the Bell Ghisallo and the Sweep R? I think the Sweep weights about 0.7 g less, probably because of a few extra vents, but otherwise?

 

i just recieved my sweep r yesterday (crash replacement). a training buddy uses a ghisallo and said he would get the sweep over it (his wife has a sweep) the biggest difference to me is the straps. sweep straps are alot softer. this is nice for me (beard) helps keep the irritation down a bit. per bells websit ghisallo is 11.6oz., sweep is 9.9oz. try them both on and pick which you like better, both very attractive helmets.