ΔE 7.5, close: similar, with a visible difference side by side. IJA Earth Brown is more muted, cooler than Brown.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). IJA Earth Brown is more muted, cooler than Brown.
The same difference applies the other way round: Brown is 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.
See Brown on the colour wheel See IJA Earth Brown on the colour wheel
All matches: Brown equivalents · IJA Earth Brown equivalents