ΔE 6.1, close: similar, with a visible difference side by side. Japan. Unif. WWII is more saturated than Sandy Brown.
Usually, if you are not matching paint already on the model. Close match (ΔE 6). Japan. Unif. WWII is more saturated than Sandy Brown.
The same difference applies the other way round: Sandy Brown is 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 Sandy Brown on the colour wheel See Japan. Unif. WWII on the colour wheel
All matches: Sandy Brown equivalents · Japan. Unif. WWII equivalents