ΔE 8.5, close: similar, with a visible difference side by side. Steel Legion Drab is more muted, warmer than Mid Battle Dress.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Steel Legion Drab 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 Steel Legion Drab on the colour wheel
All matches: Mid Battle Dress equivalents · Steel Legion Drab equivalents