ΔE 16.1, loose: different enough that you should pick on purpose. Green Brown is a little lighter, warmer than Light Moss Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Green Brown is a little lighter, warmer than Light Moss Green.
The same difference applies the other way round: Light Moss Green is a little darker, 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 Light Moss Green on the colour wheel See Green Brown on the colour wheel
All matches: Light Moss Green equivalents · Green Brown equivalents