I would say neither and vote for a totally free sim that is the internets best kept secret. It is a Japanese sim called BVE (Boso View Express) and it is a cab view sim, none of this looking at the roof, can you do that in reality?
You can download the sim from
www.mackoy.cool.jp but I recommend a trip to
www.trainsimcentral.co.uk where you can find a guide to installing the program plus a look at some of the best routes available for the sim and the new features that you can get with the most recent edition.
Hope some of you are brave enough to go for the unknown, and don't forget it is totally free, including all the add-ons.