It sounds like a good trade if you have the extra and do not have a Vita.
However, if you are looking for insight on the Vita, I can give you very little. Ronalopolis has been playing some Ninja Gaiden and some soccer on it, I got Katamari and was not a fan of the control scheme that required the back panel...so we've been using ours primarily for PSP games we missed that are on digital download, and although they look pretty, if you already have a PSP you already had access to them.
If you did not already have a PSP, and you're OK with digital copies, there were a few games that are worth playing and I definitely say go for it then.