Mike, the clamp you showed is intended for mounting other cameras on the Sinar Rail. You could get creative and use it to mount the rail onto the pan-tilt head with an intermediate threaded plate, but the clamp is bulkier than any of the regular rail clamps, the rail ends up off-centre on the head, and you have to remove a standard and slide the rail through the hole, instead of just lifting it out.
The Norma clamps are lower profile, but they also don't allow the rail to just lift out. Well, they do, but you have to leave the plastic insert on the rail, and the bolt head can foul the bellows. I used to just detach the rail clamp from the head (unscrewing a vertical bolt never seemed any harder to me than unscrewing a horizontal one). Now I leave the rail clamp on the head and have got good at loosening the front standard, sliding it off the rail, pushing the rail through the clamp and putting the front standard back on. Sounds complex, but takes little time and the camera takes up less room in my pack.
ps: I use the top plate of my 3-series Gitzo as a sort of quick release. Undo a bolt with a 10 mm spanner and the whole top plate, head, clamp and camera lift right off. I have another top plate with a ballhead I use for MF and 35mm, it slots right in.