FR-S Head Unit in BRZ?
 

I love my new BRZ, but the nav screen is vastly inferior even to the unit in the FR-S, which I prefer because of its nicer physical buttons and less confusing nav and music menu systems. I was thinking of getting an aftermarket unit, but I'm not crazy about any of the options I've seen for that, and in any case, I really want to continue using the stock bluetooth mic.

So this might be a stupid question, but if I buy the head unit from a 2014 FR-S and stick it in my BRZ, shouldn't it basically work seamlessly? I.e., is there any reason why the stock bluetooth mic wouldn't work? Has anyone else done this, or thought of doing it?

Thanks!
-gatsbysghost