They are Distributor Exclusives from TALO. They make only a certain amount of them.. I can't rememeber the numbers, but something like 1,500-2,500 per edition. These are reffered to as "Wiley Clapp" Gp100 (the guy who helped design the changes for the special edition).
Last years model was a stainless model.
This years model is like last years, except it is in a black finish and the front sight is a different. Ruger does not have the newest version shown on their site yet. Ryu825 has the latest version.