Odan,
You can download games digitally on both 3DS and PS Vita. It really matters what you'd prefer.
3DS has Fire Emblem Awakening, which is indeed a massively fun strategy game game. It's better in my head than on the screen (if you play it, let me know- I think you'd like my retake), but it's a game with a strong character cast and interaction element. It would be weak as a Bioware RPG, but if you like social interactions between NPCs and companions you'd probably like it.
If you want a game with killer character development, plot, and a more RPG-ish experience, complete with role playing, emotional connection, and Earn Your Ending, I recommend PSVita. Persona 4: the Golden is an amazing game, and the list of other high-quality JRPGs you can getis good as well