I just bought the Ps3 version of Dragon's Crown after playing the Vita version for months now. It's a really really beautiful game on the big screen, but I vastly prefer the Vita's controls for this game. It was quite shocking really how spongy and unresponsive the Ds3 feels compared to how tight the Vita's Dpad is.
One more thing cross-save is pretty sweet.
Yeah, I like to play it on the Vita whenever I can. The cooking minigame and clicking on shinies is just so much easier on the touchscreen. The PS3 version is the best for playing multiplayer with more than 2 people though.