ΔE 8.0, close: similar, with a visible difference side by side. Japan. Unif. WWII is a little darker than Dune Shadow.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Japan. Unif. WWII is a little darker than Dune Shadow.
The same difference applies the other way round: Dune Shadow is a little lighter.
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 Dune Shadow on the colour wheel See Japan. Unif. WWII on the colour wheel
All matches: Dune Shadow equivalents · Japan. Unif. WWII equivalents