Bhai sb khud hi question and khud hi answer de rahay ho ..... Lemme make it a bit simple for you brother.
JDM cars are mostly bought to keep and use ...... local made are bought to drive for a while and then sell.
Either dont buy it or buy and keep for few years and then if it gives u loss, its worth it. Swift is not a bad car as well, I kept one and sold it for profit few years back. As we see new JDM models on road and they will keep on coming which means in long term Belta wont get you profit if u r looking for.
Last but never the least, if u have to choose b/w Belta and Swift considering you will sell it in a year time or so then wise decision will be swift.
I hope Belta owners dont hate me for this .....