ΔE 8.7, close: similar, with a visible difference side by side. Mahogany is a little darker, cooler than Werewolf Brown.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Mahogany is a little darker, cooler than Werewolf Brown.
The same difference applies the other way round: Werewolf Brown is a little lighter, warmer.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Werewolf Brown on the colour wheel See Mahogany on the colour wheel
All matches: Werewolf Brown equivalents · Mahogany equivalents