Death World Forest vs Viridian Grim

How close are they?

ΔE 26.0, loose: different enough that you should pick on purpose. Viridian Grim is a little darker, much more muted, cooler than Death World Forest.

Can I use Viridian Grim instead of Death World Forest?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 26). Viridian Grim is a little darker, much more muted, cooler than Death World Forest.

Can I use Death World Forest instead of Viridian Grim?

The same difference applies the other way round: Death World Forest is a little lighter, much more saturated, warmer.

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.