ΔE 17.1, loose: different enough that you should pick on purpose. Green Ochre is a little lighter, more saturated, cooler than Brown (JGSDF).
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Green Ochre is a little lighter, more saturated, cooler than Brown (JGSDF).
The same difference applies the other way round: Brown (JGSDF) is a little darker, more muted, warmer.
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 Green Ochre on the colour wheel
All matches: Brown (JGSDF) equivalents · Green Ochre equivalents