ΔE 8.4, close: similar, with a visible difference side by side. US Earth Red is a little lighter, more muted than Wood Brown.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). US Earth Red is a little lighter, more muted than Wood Brown.
The same difference applies the other way round: Wood Brown is a little 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.
See Wood Brown on the colour wheel See US Earth Red on the colour wheel
All matches: Wood Brown equivalents · US Earth Red equivalents