ΔE 7.7, close: similar, with a visible difference side by side. Cam. Black Green is more muted than Battlefield Brown.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Cam. Black Green is more muted than Battlefield Brown.
The same difference applies the other way round: Battlefield Brown is more saturated.
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 Battlefield Brown on the colour wheel See Cam. Black Green on the colour wheel
All matches: Battlefield Brown equivalents · Cam. Black Green equivalents