At the core they all are, however if you compare that version to earlier versions and to the Grand Prix legends version, they are all different. They don't all share the same geomerty data, but they all started from Grand Prix legends tracks data. I have two versions of the Nordschleife in my game, one is called the Nordschleife green hell, and the other is the Nordschliefe 24hrs, the 24hr circuit is a lot better than the green hell circuit imo, both in layout and in textures. There are some scratch built rings being made at the moment, but I'd rather someone try to re-create the Isle of man TT track, I've spent so much time racing the ring in so many games I'd like to try a new track that's similar in scale.