ΔE 30.1, loose: different enough that you should pick on purpose. Nocturne Skin is noticeably lighter, much more saturated than Matt Black.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 30). Nocturne Skin is noticeably lighter, much more saturated than Matt Black.
The same difference applies the other way round: Matt Black is noticeably darker, much more muted.
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 Matt Black on the colour wheel See Nocturne Skin on the colour wheel
All matches: Matt Black equivalents · Nocturne Skin equivalents