Well, all I can say is I have experienced less body sway since our Koni installation one year after we purchased our brand new coach. You can relate to the mechanics of a shock all you wish and what it does. But the switch for us was and is noticeable.
So if other shocks are designed for different reasons in comparison, it's not totally unacceptable that Koni's could show improvement. It did. Where it's noticeable the most is turning from a out from drive with a incline down to street level and the body sway side to side. Much less. The Sach shocks that came on the coach were terrible. The coach dipped so much when braking it wasn't funny. It didn't help on the side to side sway either.
I'm not claiming it's the fix for the problem, merely it helped make the problem easy to live with on ours.