ΔE 9.6, close: similar, with a visible difference side by side. Dark Flesh is more saturated, warmer than Medium Sand.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). Dark Flesh is more saturated, warmer than Medium Sand.
The same difference applies the other way round: Medium Sand 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 Sand on the colour wheel See Dark Flesh on the colour wheel
All matches: Medium Sand equivalents · Dark Flesh equivalents