Quote Originally Posted by cogdoc View Post
Having recently spent some time on erwin, and having just read the 125kw self study manual, the differences are according to VW themselves:

Different injectors and higher pressure
Bigger turbo, different actuator mechanism and more accurate sensor
Lightened but forged crank - 4 counterweights instead of 8
Extra cooling channels in the block, especially around the injectors
Different EGR, with much larger exhaust gas cooler
Different head, lower profile valves, different pistons, trick headgasket
Changes to the inlet manifold, more agressive dual port inlet design with active swirl flaps

So definately a lot more than a re-map!
copy that and paste it every time someone says "i can just chip my comfotline and it'll be the same as a gt sport" bla bla bla