Is the general rule about these two..
authoritative: If you deleted an OU and that replicated to your other domains, then you would use this approach since after the restore of the lost OU it will place a newer timestamp on it and replicate to the other domains
non auth: When you need to do a restore of a domain, and it doesnt matter or you want the other domains to replicate their data to this one..
I think after nailing this stuff down and like 2 other subjects I should be a shoe in on this test... hopefully

Thanks for any responses