Vita Prep vs Vita Prep 3

[Lollipop]

I ordered a prep 3 from someone one e-bay but was sent the 2 hp vita prep instead. I'm wondering whether it is worth sending it back, or if it is just as good. Anyone have experience with both of them? Thanks so much!

[Blossom]

I have both and don't notice much difference between them.

[Lollipop]

Thanks for your input!