This doesn't surprise me as the performance figures are very close. I used to own both the ED30 and MK6 at the same time both with DSG and the ED30 was sligthly faster of the two. It didn't make any difference who was driving which with me and Mrs it always ended up with the ED30 in front on a dual carriageway but there really wasn't much in it.
To give you another comparison when comparing to two against another benchmark the R32 my mate has a one with DSG the MK6 is identical on the road but the ED30 a little faster than that too. As the ED35 is heavier than the ED30 I don't see there being any difference in the performance between the two. I also had a few blasts against S3's in my ED30 and they were identical on the road.
Another factor will be mileage as the GTI doesn't free up fully until approx 10k and at this point it may be producing more power than when it left the factory hence the higher RR figures. I have also seen RR graphs showing the GTI with 220 ish and the ED30 240 ish but unless they are back to back on the same rollers its not really a proper comparison.
I do know that the way the GTI's and ED's produce thier power the ED's feel quicker to drive more than how they perform on the road.
So I get my ED35 tomorrow and I will have a big smile on my face but know that until its done 10k it wont be any quicker in real terms than my MK6, but we will see when I come across a MK6 or an R32 or an S3 and I will be able to let you know if its slower
