ΔE 18.1, loose: different enough that you should pick on purpose. Carbon Black is noticeably darker, much more muted than Tainted Garden.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Carbon Black is noticeably darker, much more muted than Tainted Garden.
The same difference applies the other way round: Tainted Garden is noticeably lighter, much 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 Tainted Garden on the colour wheel See Carbon Black on the colour wheel
All matches: Tainted Garden equivalents · Carbon Black equivalents