Even that is not accurate, since it doesnt involve possible wait times. Example with 1 track:
Olympus is best at 0:00 WT
Hydra is best at 1:00 WT
Ogre is best at 3:00 WT
Situation changes at 2 tracks and again if you add some integration. There really isnt any easy option to declare which train is always best. It depends very much on situation and play-style.
Also i need to point out that the total number of waggons might be a deciding factor. For example Olympus has 13 waggons per slot, while Ogre has 25. Thats a huge difference in expenses. I usually need about 400 waggons for endgame which is about 1 billion credits. Using Ogre i would need some 700 waggons, which would be about 1,8 billion credits.