Did you look at the linked track? I bet, the Nordic piste does not run the exact same way as the track, which will be invisible in winter anyway, unless where it goes through the trees from the lack of trees in its area. Apart from being access=private, from looking at the aerial, it is not much of a track neither.
Regarding “cleaner”: In the iD editor, separate ways certainly so, in the sense of more comprehensible. I remember spending an hour or more “cleaning” a local resort of doubly mapped pistes, because an iD user did not notice that the pistes already mapped, as these were – and obviously still are – shown as plain old tracks.
Also curious about different meanings of difficulty, will comment in the other topic.