ΔE 9.8, close: similar, with a visible difference side by side. USAF Tan is more saturated, warmer than Medium Soil.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). USAF Tan is more saturated, warmer than Medium Soil.
The same difference applies the other way round: Medium Soil is 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.
See Medium Soil on the colour wheel See USAF Tan on the colour wheel
All matches: Medium Soil equivalents · USAF Tan equivalents