To be absolutely honest I don't really care what mine is. R, Mille, Edwards (Wishful thinking) whatever.
I think I will send a letter or email to Aprilia asking for full clarification of what exactly my bike is but this is being done for insurance classification only.
As Spoonz said if you incorrectly advise your insurer of your bikes specification then they will not pay out any claims submitted. I know this for a fact as I am an insurance claims manager.
Anyone know of a way to breakdown the chassis number so you can tell what it is, where it's from etc....?