ΔE 21.8, loose: different enough that you should pick on purpose. Battledress Brown is a little darker, much more muted than Cygor Brown.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 22). Battledress Brown is a little darker, much more muted than Cygor Brown.
The same difference applies the other way round: Cygor Brown is a little lighter, much 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 Cygor Brown on the colour wheel See Battledress Brown on the colour wheel
All matches: Cygor Brown equivalents · Battledress Brown equivalents