ΔE 14.6, fair: the same colour family, but not a straight swap. Smoke Ink is a little darker than Sooty Black INK.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Smoke Ink is a little darker than Sooty Black INK.
The same difference applies the other way round: Sooty Black INK is a little lighter.
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 Smoke Ink on the colour wheel
All matches: Sooty Black INK equivalents · Smoke Ink equivalents