The roadmap says that the BR 612 and the BR 143 are included. There were no details about the wagons that come with the BR 143. The S3 and RB30 both used Doppelstockwagen, but they were different between the lines. The S3 uses Dosto from the 4. Generation you know from Dresden-Riesa: The RB30 operated with older Dosto from the third Generation, built in 1995: In the second picture, the wagon behind is a DR-Dosto, first Generation. This wagons are also not inaccurate: You maybe see, those different kinds of wagons can operate in mixed formations and are a lot more variety. Now it is in your hands, dovetail. You have to do what is the best for you, but the Dostos in TSW2 right now get boring. This route is a good chance to get more variety in the wagons. The third generation Dosto are most accurate for the RB30, but the S-Bahn Dresden Dosto are not very inaccurate for this line tbh. I better tell you about the Dosto before the route is in upcoming like on Hamburg-Lübeck, so you could change your plans if you want.