They're interchangeable in my Z.
The GT-R start button looks like a start button. The stock piece in the Z looks like an elevator button.
The map light lenses in the Z have an embarrassingly outdated frosted finish, but the GT-R set has a finish that actually let's light pass.
How do u like your Z? 370? Been contemplating test driving one. Just afraid if I do, I might like it. My Civic is getting a bit tired lately. Lol.