Adding a MAC to a Windows Domain - well not quite
First off, Macs will happily bind to Active Directory domains - there's some variation between versions of AD and OS X, but if you're on AD 2008 or newer and OS X 10.8.3 or newer you won't have any problems.  Use the Accounts preference pane, open Directory Utility for more control, or use dsconfigad from the Terminal.  Once a Mac is bound, you will see it in your AD domain's Computers, just like anything else.

The UUIDs will be different, based on the order of account creation, but there is no functional difference between any two accounts that have been granted administrative rights.  You can also specify AD groups when binding to grant admin rights (typically AD domain and enterprise admins).

Accessing the SMB share will be based upon that share's owner and permissions.  If the user logs in to the Mac with his AD credentials, they should be able to easily connect to the share; with a small amount of effort you can easily add the share to auto-mount at login.

You might want to check out AFP548 for more resources on Macs and AD.