ΔE 6.2, close: similar, with a visible difference side by side. Plaguebearer Flesh is more muted than Desert Sand. They are different kinds of paint: AMMO by Mig Desert Sand is an opaque base/layer paint and Citadel Plaguebearer Flesh is a one-coat contrast-style paint, so they won’t behave the same on the model even where the colour is close.
Usually, if you are not matching paint already on the model. Close match (ΔE 6). Plaguebearer Flesh is more muted than Desert Sand. They are different kinds of paint.
The same difference applies the other way round: Desert Sand is more saturated.
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 Desert Sand on the colour wheel See Plaguebearer Flesh on the colour wheel
All matches: Desert Sand equivalents · Plaguebearer Flesh equivalents