If you have lots of German content in TSW2020 already then HRR is a great route to run all your trains on, and the two EMUs that come with it are also good. I’ve got all the German content that can run on it and it has plenty of services for all of them. In contrast, currently in TSW2 there are only the two trains that come with it and it feels very empty (I’m waiting for the preserved collection to add all the other trains to it, so currently only playing it in TSW2020). So, if you have the German content or are planning on getting it, get HRR because it’s a must.