Just to share my personal experience. Since I started with TSW2, I can't persuade myself going back to TS2020 again, although there are still much to improve on TSW2, and TS2020 is already a quite mature product. I don't have the same feeling on TSW1 but only on TSW2, mostly because the improvement done on graphics and longer travel distance of the route. It is a pity that I still have a lot unplayed content in TS2020, I just can't go back. Anyone has the same experience?