Sadly I only own the 3DS models, which don't have the GB slot, as far as I know? To be fair, I'm going to emulate WOTL to get it more performant than the PSP (and I don't trust my PSP battery after all these years), so I could just emulate TA as well. (I own both games physically so that's fine) Would you recommend playing TA?

For convenience, and maybe new content (I don't actually know, outside of the job system what's new about the rerelease) it's gonna be The Zodiac Age version.