I've been listening to The Radiator Arms podcast, and in one of the episodes ( I can't remember which episode to put the link in) one of the hosts mentioned in passing that his son was a professional racing driver. He said one of the race series he was in was VW Golfs and they were MK 5's with MK 6 front end body panels on, because the MK 6 had just come out and VW wanted them to look like the newly released car, but the MK 5's rear suspension was better in some way but he didn't know the details. As I mentioned earlier it was just said in passing and that was that, but I'm curious if anyone knows what is actually different.