Corvus Black vs Doom Death Black

How close are they?

ΔE 15.3, loose: different enough that you should pick on purpose. Doom Death Black is noticeably lighter, more muted than Corvus Black.

Can I use Doom Death Black instead of Corvus Black?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Doom Death Black is noticeably lighter, more muted than Corvus Black.

Can I use Corvus Black instead of Doom Death Black?

The same difference applies the other way round: Corvus Black is noticeably darker, 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.