Waffen Brown Grey vs Dryad Bark

How close are they?

ΔE 9.2, close: similar, with a visible difference side by side. Dryad Bark is a little darker than Waffen Brown Grey.

Can I use Dryad Bark instead of Waffen Brown Grey?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Dryad Bark is a little darker than Waffen Brown Grey.

Can I use Waffen Brown Grey instead of Dryad Bark?

The same difference applies the other way round: Waffen Brown Grey is a little lighter.

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.