Bog oak and ebony cannot be ranked reliably by name alone for finished handle weight. They are also different kinds of description: bog oak refers to oak altered during prolonged wet burial, while “ebony” can refer to more than one Diospyros species. The useful comparison is between identified, conditioned pieces made to controlled dimensions.
What bog-oak research actually establishes
Sinkovic and colleagues’ comparison of bog and recent oak examined particular Quercus robur samples. It explains that bog oak’s darkening involves wood tannins and iron in the surrounding water; in that study, the bog samples were denser and shrank more than the recent-oak comparison, and controlled drying was needed to limit cracking. This was not a comparison with ebony, and its results do not prove that every bog-oak handle will outweigh—or undercut—an ebony handle.
Long exposure to water also does not make a finished bog-oak handle soak-proof. Blank condition and controlled drying remain important. An unidentified dark specimen should not be assigned an age, origin or certification merely because it is called bog oak.
Ebony needs a species-level description
Ebony is not synonymous with uniformly jet-black Gaboon ebony. Horn & Grain stocks Macassar ebony, and the catalogue shows ebony paired with both black and white buffalo horn. The Macassar ebony and black buffalo horn wa handle is currently available.
Bog oak, by contrast, is absent from the current catalogue and configurator. The published wood guide is the appropriate reference for offered materials; this comparison does not imply that a bog-oak blank is available.
Compare a controlled handle, not two labels
Material names alone cannot establish which finished handle will be heavier. An informative comparison requires actual same-size dry blanks or finished handles, with external dimensions, tang cavity, ferrule and end cap held constant. If one design uses more material, its added volume changes the result before a broad species comparison can settle it.
The same discipline applies to balance. A handle’s effect depends on its finished mass, geometry, fit and the knife it joins, so the desired change from the knife’s present balance is more useful than a universal “heavier wood” claim.
The decision is therefore clear: choose bog oak only when the particular blank’s identity, condition and aged-oak character are verified; choose the identified Macassar ebony route when the currently published option suits the design. Exact feel remains a matter of fitting and proportion, not dark colour alone.