Wyldwood vs Elfwood Brown

How close are they?

ΔE 7.3, close: similar, with a visible difference side by side. Elfwood Brown is a little lighter than Wyldwood.

Can I use Elfwood Brown instead of Wyldwood?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Elfwood Brown is a little lighter than Wyldwood.

Can I use Wyldwood instead of Elfwood Brown?

The same difference applies the other way round: Wyldwood is a little darker.

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.