On these 2 tracks they have changed some grafical things. The Nürburgring has a Rollercoaster behind and before the main grandstand and some new buildings that we don't have in GP4. And Suzuka changed pitbuilding last year and I found a 2006 layout by KTC, but whitout changing the new pitbuilding.
Damn that I'm not skilled eough to create buildings and can't add them to the circuits
But I think, someone out there could and It would be very nice If we have a Nürburgring with the new "Ringracer"-rollercoaster and Suzuka with the new Pitbuildings.