Kevin-
Fairly certain Randall is correct - the body mounts are nearly identical, but the dzus style ones have the extra wires on them for the dzus fasteners. These wires are on the backside of the mounts, so the body itself has to have extra holes to give room for those wires. Basically 2 body holes for the screw type, but 4 body holes for the dzus type.
And if you have a spare set of dzus mounts, I'm looking for some! I have the equivalent for the screw style as barter material.
Randy