Also, it allows to rotate the camera (in 90º steeps) or allows curved bridges or with switches or crossings (Not all bridge types allow them).
Tunnels needs 2 height steeps to be allowed, TTD needs 1, also, they are done only in vertical walls.
Look at the mountains on right:
I don't know the internal code of Locomotion, I only know that there are 4 different curves (1×1, 2×2, 3×3 and 4×4) that could be overlapped in order to get railway switches.I think this has been discussed before, and I think I again did some mockups. Again I will look them up given some time.
Do you know how the turning is solved Locomotion? Do they have the same number of model views?
Booth.Do you mean the resolution or different proportions?
In Locomotion some sets has a small reduction in length (Spanish trains, for example is 0.

Also, TTD trains have a 2:1 scale reduction, so a bus is bigger than a train coach.
Source of photos:
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