ΔE 8.9, close: similar, with a visible difference side by side. Tan Earth is a little lighter, more muted, warmer than Brown (JGSDF).
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Tan Earth is a little lighter, more muted, warmer than Brown (JGSDF).
The same difference applies the other way round: Brown (JGSDF) is a little darker, more saturated, cooler.
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 (JGSDF) on the colour wheel See Tan Earth on the colour wheel
All matches: Brown (JGSDF) equivalents · Tan Earth equivalents