Pay extra and Koni will valve to your spec, and fit adjustable bump valves too if you really want it. The wide range of actual stiffness adjustment is big plus on the Koni side of the sheet, most other adjustable dampers actually have very little range of stiffness from soft to stiff, despite often having a ridiculous number of settings (i.e. 'clicks', some of which make no change at all...). Of course, more adjustment range means more opportunity to get the settings wrong...
On the other hand, only a very limited number of Bilstein dampers use adjustable valves. Bilstein considering that a good adjustable valve will never be quite as good or reliable as a good non adjustable valve, all else being equal. Bilsteins are designed for relatively easy valve changes (if you have the gear to do it).

