ΔE 6.1, close: similar, with a visible difference side by side. BS Dark Earth is more muted, warmer than Mid Battle Dress.
Usually, if you are not matching paint already on the model. Close match (ΔE 6). BS Dark Earth is more muted, warmer than Mid Battle Dress.
The same difference applies the other way round: Mid Battle Dress is more saturated, 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 Mid Battle Dress on the colour wheel See BS Dark Earth on the colour wheel
All matches: Mid Battle Dress equivalents · BS Dark Earth equivalents