Originally Posted by AKjitsu
I've had a few Profiles and find the fit of the Shoei RF 1100 to be almost identical
I own a Profile and and have tried the Shoei RF-1100 and highly disagree
with this statement. The Profile is made for those with a long and narrow head (long oval). Most Shoei's have a rounder shape and fit those with round heads optimally - the opposite of long oval. When I tried on a Shoei RF1100 I had a pressure points on my forehead and back of head and all kinds of room at the sides. These two helmets are on the opposite ends of the fitment spectrum.
Arai now makes the Signet-Q for long oval heads. The Bell RS-1 fits like an intermediate oval helmet and may work on a LO head. Shark make some helmets for a narrower head. Check WebBikeWorld helmet shape guide.