Even though there are some tubing attachment similarities between those 2 helmets, they really are quite different from each other, aren't they?
I've been seeing the WM onslaught lately too, and saw several CZ-4s of which I bought the other 2 I needed. The sculpting detail in the forearms and chest is superb, and the paintjob is wonderfully dirty. I may clean one of them to better represent the ANH version, but that's no complaint on the excellent wash the figure has.