I recently bought a copy of the 2005 Mini-Series Into the West.

The store had multiple copies, one was much thicker, kind of like a box and when opened the digipack could be lifted out.

The one I chose to buy was less thick and instead of a box containing the digipack, the digipack slid into a slipcase.

Pics of the one I bought is linked below.
Here.

If one downloads the profile, the back cover shows the box and how the discs fit into it.
UPC#678149448122

As far as I can see the artwork is the same.