AR2201:
The Krieghoff for sure adjusts with a screw and wedge system. The barrels can be adjusted for windage (horizontally) but not up and down. The Blaser S2 also adjusts for windage and apprears not to adjust up or down.
I think thats the extent of it. The Valmet O/U adjusts for windage with jack screws but can also adjust vertically with a sliding wedge between the barrels.
If the Spartan ever gets here it will be interesting. My local gun shop has a standing order to pick me up one when they finally get here.