ΔE 10.5, fair: the same colour family, but not a straight swap. Gloss Black is a little darker, more muted than Brown Liner.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Gloss Black is a little darker, more muted than Brown Liner.
The same difference applies the other way round: Brown Liner is a little lighter, more saturated.
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 Brown Liner on the colour wheel See Gloss Black on the colour wheel
All matches: Brown Liner equivalents · Gloss Black equivalents