ΔE 9.0, close: similar, with a visible difference side by side. Desert Yellow is a little darker, more muted, cooler than Orange Tan.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Desert Yellow is a little darker, more muted, cooler than Orange Tan.
The same difference applies the other way round: Orange Tan is a little lighter, more saturated, 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 Orange Tan on the colour wheel See Desert Yellow on the colour wheel
All matches: Orange Tan equivalents · Desert Yellow equivalents