Thanks to the mod I hadn't thought about it before.
As far as Train Station Tracks are concerned, the only difference to normal Train Tracks is that the Train Station Tracks have a pedestrian walkway, which is necessary to set a stop at all.
What distinguishes the Train-Station Tracks from normal train tracks is that the Train-Station Tracks are longer than normal segments, normally all 12 raster blocks are started with a new segment, in between there is a node, the Train-Station Tracks at the normal station are 15 raster blocks long.
But how can I get longer trains into a self-made station?
Tested it, created a Train-Station Track in the Road-Editor and then extended it in the game with the "Move-it" mod, but as soon as this over 22 raster-blocks comes up, no path will be found.
For example, how does the Berlin Central Station from the workshop work?