Gremlin Green vs Battle Dress Green

How close are they?

ΔE 15.6, loose: different enough that you should pick on purpose. Battle Dress Green is a little lighter, warmer than Gremlin Green.

Can I use Battle Dress Green instead of Gremlin Green?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Battle Dress Green is a little lighter, warmer than Gremlin Green.

Can I use Gremlin Green instead of Battle Dress Green?

The same difference applies the other way round: Gremlin 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.