Thank you for your interest! We do not have a guide yet for this machine.
We have a teardown for the [http://www.ifixit.com/Teardown/iMac-Intel-27-Inch/1236/1|27" iMac], which is relatively similar, but no repair guide for either yet (as it is a very new machine). Check back often, as we are constantly adding new content!
In terms of similarity, the new iMacs are fairly unique inside, so nothing directly compares yet.
I hope this helps!