No cert with it as only UK 330s would have this, as this was a Cyprus import (although still classed as UK spec due to EU), Subaru have said there would have been nothing issued to prove of the modification done. Spoke to Prodrive themselves and they have said that yes they do install these Packs on STi's although they would have to go through a dealer as they don't deal with the public, if that makes sense.
So as far as I can tell the only things other than the performance - which Im gonna get checked when I get it home - is the sat nav, key less start stop, the exhaust ends are meant to be bigger, different seats (Recaro - half leather) and a badge on the outside & the wheels - there is not a lot to distinguish between the models....