To correct one thing the series is made by Namco which merged with Bandai I believe so it is Namco-Bandai now. And about ports they usually add nothing ports are for releasing a game again for the next generation to enjoy or for people who missed out on the first release to get it new.
Namco-Bandai adds stuff to the ports of some of them when they release them for a different console no idea why but the period of time they are released is usually 2 years or so after the initial release on one system the next system which it gets released on is usually more powerful or has more storage for data so it gets a lot or a bit of extra content. Tales of the Abyss was released quite a while back usually games released in the last generation don't get extras normally for ports unless the game is remade.
I think it's great that more people can experience this game as it was before now on the 3DS. If all this doesn't make sense meh.
Edit: Deleted and added to first post.
Namco-Bandai adds stuff to the ports of some of them when they release them for a different console no idea why but the period of time they are released is usually 2 years or so after the initial release on one system the next system which it gets released on is usually more powerful or has more storage for data so it gets a lot or a bit of extra content. Tales of the Abyss was released quite a while back usually games released in the last generation don't get extras normally for ports unless the game is remade.
I think it's great that more people can experience this game as it was before now on the 3DS. If all this doesn't make sense meh.
Edit: Deleted and added to first post.