Dangan Ronpa is a visual novel, not a JRPG. Just a minor quibble.balladbird said:It sounds like you're into JRPGs, which does indeed make this a hard call.
Vita has recently started getting a ton of JRPGs, like Dangan Ronpa, Conception II (though this one is also on 3ds) and Deception IV, so my vita collection has exploded recently.
On the other hand, the 3ds has the masterful Shin Megami Tensei IV, and a larger library all around.
I play the hell out of both consoles, and while currently I play the Vita considerably more, that's changed many times over the past few years. Flip a coin, OP XD
Personally I own both, and I'd say the Vita inches ahead for especially with the existence of PS+, which might not be worth it if you just have a Vita, but its nice if you own any of the other Sony devices.