ΔE 14.8, fair: the same colour family, but not a straight swap. Death Korps Drab is a little darker, more muted, cooler than British Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Death Korps Drab is a little darker, more muted, cooler than British Brown.
The same difference applies the other way round: British Brown is a little lighter, more saturated, warmer.
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 British Brown on the colour wheel See Death Korps Drab on the colour wheel
All matches: British Brown equivalents · Death Korps Drab equivalents