I was just goin to ask the same questions on this topic
I brought the rev G at the end of march, and got round to changing what I would assume was a C in my GTI, but after a 10min struggle was shocked to see it was actually a D! So I left it as was, knowing it is better the the C whilst I researched which I should go with. I haven't experience any boost issues but thought I would follow your recommendations of updating to either a D or G. After reading this post sound like I might be back under engine sooner than expected to pop the G in!
The part number for the revision G is: 06F 145 710G
Price at end of may was £32.27 + vat