You obviously dont understand the difference between The B6 and B8 shocks then do you.
Exact same damping forces, same valving. the B8 has a 25mm shorter throw...
Even Bilstein said it was fine as my springs were within its tolerances.
The problem is... its not "fitment marks only" its "5 years old and heavily used"
So you reckon a used & abused shock will have the same tension as a "fitment marks only" shock?
Good luck with that.