ΔE 6.9, close: similar, with a visible difference side by side. Japan. Unif. WWII is a little lighter, more saturated than Green Ochre.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Japan. Unif. WWII is a little lighter, more saturated than Green Ochre.
The same difference applies the other way round: Green Ochre 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 Green Ochre on the colour wheel See Japan. Unif. WWII on the colour wheel
All matches: Green Ochre equivalents · Japan. Unif. WWII equivalents