Diff swap question

steveeeeeboi

Long story short, I posted in the suspension/brake section about swapping brakes.

Now I want to ask my follow up question from my brake thread.

I'm going to be swapping brakes from g37s to my base 370z, as in my base brakes go back in the G and his brakes go in my Z. I want to do the same with the differential. Would it be direct drop in for both cars? or would there be parts I have to swap over at the same time such as axles etc.

Thanks in advance