The XXL is a whopper! We used to use something a similar size at work (I can't remember who made it) and it was an absolute bastard to ride. Depends what you're using it for but the XL is probably a better bet unless you have a very specific need for something massive.
Urban Arrow XL. Guy in the shop advised against the XXL. Said would be fine if I were a 6ft+ dutchman, but as a short-arse might be a bit much