ΔE 8.7, close: similar, with a visible difference side by side. Mid Battle Dress is a little lighter, cooler than Field Drab (FS30118).
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Mid Battle Dress is a little lighter, cooler than Field Drab (FS30118).
The same difference applies the other way round: Field Drab (FS30118) is a little darker, 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 Field Drab (FS30118) on the colour wheel See Mid Battle Dress on the colour wheel
All matches: Field Drab (FS30118) equivalents · Mid Battle Dress equivalents