Default G2 AOSP/AOSP like ROM state - Galaxy S4 Instead?

I need a temporary phone till the Moto X+1 comes out. I'm debating between the G2 and ght S4. I know I can get a GPE rom for the S4 so that is nice, but I prefer the camera and bigger screen of the G2.

So my question is, how good is an AOSP rom on the G2? Are there performance issues? How well can xposed make the stock rom look like AOSP?
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