ΔE 9.2, close: similar, with a visible difference side by side. Fairy Flesh is a little lighter, more saturated than Barren Dune.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Fairy Flesh is a little lighter, more saturated than Barren Dune.
The same difference applies the other way round: Barren Dune is a little darker, more muted.
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 Barren Dune on the colour wheel See Fairy Flesh on the colour wheel
All matches: Barren Dune equivalents · Fairy Flesh equivalents