ΔE 9.3, close: similar, with a visible difference side by side. Desert Tan is a little lighter, more saturated, warmer than Ochre.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Desert Tan is a little lighter, more saturated, warmer than Ochre.
The same difference applies the other way round: Ochre is a little darker, 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 Ochre on the colour wheel See Desert Tan on the colour wheel
All matches: Ochre equivalents · Desert Tan equivalents