My understanding is that on one train mode it does the first loop twice to alternate the direction the train arrives in the station each ride cycle. With two trains it will run one forwards and one backwards with the shorter ride cycle as shown in the pov’s.It's a bit hard to tell from those videos but isn't that just one setting with the train facing different directions? The trains return facing the same way they departed so presumably it has to run two to offer both experiences, whereas Gold Rush can switch between the cycles whilst running one train.