Daz, Bilstein rate their dampers in this way, and if memory serves correctly, the figures relate to the piston force required to achieve a given piston velocity, either compressing (bump setting) or extending (rebound setting).
So assuming the same test velocity is used in each case, the figures relate to the resulting piston force required to achieve that velocity, and can be compared directly, the higher the number the "stiffer" the damper - the first number IIRC then is the rebound setting and the second the bump.
I'll apologise now if my memory turns out to be shit..

The common MK2 escort bilstein strut insert ratings were 260/60 for forest and 300/70 for tarmac.