The deep relief on Tiffany coins is, in my opinion, too good for any mint that try to copy those coins.
The 2 oz coins in antique finish, with a window pane, have only one name: Tiffany Art from CIT.
The price of all these copies rise and fall in a couple of months, while Tiffany Art coins from 2004 and 2005 worth a fortune today!
Alex.