Nintendo 3DS vs Sony PS Vita?

I'm a 14 year-old girl becoming 15 in March. Both have good and bad things. Ps Vita has psp games, but memory card are too expensive. 3ds has a bigger library and can play ds games without digital download like for psp games, and comes with free memory. Ps vita has better graphics and more apps. Which should I... show more I'm a 14 year-old girl becoming 15 in March. Both have good and bad things. Ps Vita has psp games, but memory card are too expensive. 3ds has a bigger library and can play ds games without digital download like for psp games, and comes with free memory. Ps vita has better graphics and more apps. Which should I get? This is for my next christmas present for 2013.
Thanks :)
Update: Also, 3ds is region locked while ps vita isn't
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