What is the cost comparison between mechanical and hydraulic snubbers?

In general hydraulic snubbers are more costlythan mechanical snubbers for a particular size.

Hydraulic Snubbers (Fig. 511 AD) with Protective Boots Designed for a Hydro-sulfuric Acid Environment in a Geothermal Power Plant
Hydraulic Snubbers
Mechanical Snubber Assemblies Custom Designed for an Oil Refinery in California
Mechanical Snubbers