Mid Soviet Khaki vs Uniform Brown

How close are they?

ΔE 9.8, close: similar, with a visible difference side by side. Uniform Brown is a little darker, more saturated, warmer than Mid Soviet Khaki.

Can I use Uniform Brown instead of Mid Soviet Khaki?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Uniform Brown is a little darker, more saturated, warmer than Mid Soviet Khaki.

Can I use Mid Soviet Khaki instead of Uniform Brown?

The same difference applies the other way round: Mid Soviet Khaki is a little lighter, more muted, 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.