Love some of the responses on here.

In standard form, on paper, the Edition 35 has a 25 bhp advantage over a standard Mk6 GTI. Given the weight of these cars, that's not alot. Side by side, you would perhaps see the Edition 35 nose ahead ever so slightly, but it's no where near enough power to pull out and pass a standard GTI. And that's going by the paper figures...
... on a rolling road, the GTI Mk6 puts out around 220bhp in standard trim. (If you don't agree with this have a search for folks that have tested them - Superchips recorded something like 230hp+ out of theirs IIRC. I've also tested my own and standard it achieved 221.7 bhp). As of yet I'm not aware of the Edition 35 outperforming VW's quoted figures, but given VW's lack of effort in the Edition 35, I'd be surprised if anything more than the quoted 235bhp was found. That narrows the gap between the cars to a mere 15bhp. Add into the mix the quicker spooling of the standard GTI's turbo and it's no surprise that the GTI in standard guise was able to match the "more powerful" Edition 35.
As for mapping both cars, well that's a different matter. Again using my own GTI as experience, against the Mk5 Edition 30 (same engine as the Edition 35), the standard Mk6 is pretty close. The horsepower figures may be marginally higher in the Edition car, but until the air flow and cooling of the cars are upgraded, the smaller turbo in the GTI does a fine job of matching the bigger turbo in the special edition cars.
On the road the two cars, with Stage 1 software, are pretty similar.