The one Curt tweak or invention that I remember fairly well when looking at a Sachtler arm was the method of flipping from regular to goofy - no "aircraft" quick pin - which made the arm very sleek and friendly in that region... perhaps it was a bit more difficult or required a tool (I can't remember) to make the flip, but it was clearly different than the other manufacturers...
Jerry
What I found interesting when I did the Artemis Workshop last year with sachtler was the fact that you take off the top stage and the gimbal and put the gimbal back on upside down for low mode. That way you can use the gimbal in the usual way when operating low mode. I don't know if thats also the way with other systems but with my U2 it is not.
Markus