The exporter issues were finally sorted out today, which means I'll probably go through this thing during the weekend and hopefully finish the textures.
Right now, as you have noticed, both the Transport and the Train use the same model. Had a bit of an interesting discussion over skype about this, so figured I may as well poll it to see which one would the community prefer.
The two options on the poll:
Same model: InRP, both Train and Transport would be the same ship, which can adjust its frame based on the amount of load its carrying (hence the rail and stuff). I personally kinda like this idea, as it adds a bit of flavor to the ship's lore, and it's something we don't really have in Disco outside of the CivTrain line. On the other hand though, two ships using the same model could get old much faster.
Altered model: InRP, the Transport will be the original model, and the Train will be retrofitted to be able to carry a larger load. This means the model of the transport will be slightly altered and probably with some components tacked on to it to make it look different enough as its own thing, rather than just a "happy" BWT.