Not sure if they're different but for an Edition 30 they are around £160 each from memory. I had some problems a few months ago with a cold start stutter, and this was vw's fix. Replace all four injectors. In the end I had them cleaned by a company in Bristol (I think) but it didn't fix the issue I had. I was told by someone on here they should just have replaced them, but I'm happy to report steady use and long journeys seems to have made thing a lot better.
Maybe try injector cleaner first?