I believe it is based on the 500th Vader only difference is the silver shoulder armor damage and the helmet is glued on. It is exactly the same as the #013 Hoth Vader again with the helmet dome glued on.
Oh, one more thing with the previous 2 releases you could take the cape off, but again since the dome is glue on, the elastic band won't fit over/around it so it's not really removable any longer.