ΔE 9.7, close: similar, with a visible difference side by side. Green Brown is a little lighter, more saturated than Earth Green.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). Green Brown is a little lighter, more saturated than Earth Green.
The same difference applies the other way round: Earth Green is a little darker, more muted.
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 Earth Green on the colour wheel See Green Brown on the colour wheel
All matches: Earth Green equivalents · Green Brown equivalents