ΔE 16.3, loose: different enough that you should pick on purpose. Battle Dress Green is a little darker, more saturated, warmer than Light Drab.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Battle Dress Green is a little darker, more saturated, warmer than Light Drab.
The same difference applies the other way round: Light Drab is a little lighter, more muted, 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 Drab on the colour wheel See Battle Dress Green on the colour wheel
All matches: Light Drab equivalents · Battle Dress Green equivalents