Bianchi offered the first copies as commemoratives and they are exactly like the Duke's that they made him. Then they made a regular production item which was a close copy (it was not "exact" on purpose) of the Duke outfit for the public. It was just after they made the Duke's at his request. The Bianchi belt is made just like the authentic money belt style but is sewed closed on the ends and the cartridge loops are sewed thru both layers of the belt for strength the same as the Duke's and does not function as a money belt.
The El Paso early versions I have use true money belts but I don't know if their current production is.
Both EP and Bianchi rigs are excellent and I've used a 1/2 dozen for various guns and various sized belts as I grew! They are a very practical holster rig design IMO and the money belt style w/rough side out is VERY comfortable and flexible which stays put and conforms to one's shape.
I used to sell Bianchi holsters and asked John Bianchi about the 1st one. He told me that to the best of anyone's knowledge, it was Bob Brown* that made the original, followed by copies from Alfonso, Bianchi did one in the 1970's at the request of the Duke, and El Paso made the last one for the movie 'The Shootist'. But Wayne had lost so much weight by the time they started filming, that it was too big, so props ran out and bought the 1st thing off the rack they could find, that's why he wears...sheesh...a Hunter rig in the movie.
*Wm. Brown Holster Co., Tombstone, Arizona says John Wayne's gun belt was actually a non-functional money belt, originally made by the artist Bob Brown of Hollywood.
Original Duke rig:
Bianchi commemorative set (notice no holster back flap) then production rig below it shown here:
http://www.cascity.com/forumhall/index.php?PHPSESSID=cae0f66e3f18c2f62a2bfce619f7c674&topic=36075.25
Fairly current El Paso version: