ΔE 17.5, loose: different enough that you should pick on purpose. Mahogany Ink is a little darker, warmer than Sooty Black INK.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Mahogany Ink is a little darker, warmer than Sooty Black INK.
The same difference applies the other way round: Sooty Black INK is a little lighter, cooler.
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 Sooty Black INK on the colour wheel See Mahogany Ink on the colour wheel
All matches: Sooty Black INK equivalents · Mahogany Ink equivalents