Any sound difference? I can get one or the other for the same price. I have stock DP and will not upgrade it. Fitment is the same right? (I have a GTI rear lip in hand)
The only difference in fitment (aside from the rear lip which you have), is the size of reducer for the downpipe. The reducer for the GTI catback is probably sized for the GTI downpipe, which is larger than the golf downpipe. You can usually just get a different reducer for cheap to replace it though.