I have both, am currently (really) enjoying Silent Hill* on Vita, but if I had to have one there'd be no contest: 3DS. There's simply more--and better**--games both now and going forward. (Don't delude yourselves: a machine that is taking over Japan will have *tons* of games, and there's no way the Vita will be able to keep pace in quantity, and probably quality.)
*Anyone want to do some MP on this?
**Blahblahblah subjective, it's only your opinion, belaboring the bloody obvious.







