ΔE 11.7, fair: the same colour family, but not a straight swap. Barren Dune is more muted, warmer than Medium German Yellow.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Barren Dune is more muted, warmer than Medium German Yellow.
The same difference applies the other way round: Medium German Yellow is more saturated, 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 German Yellow on the colour wheel See Barren Dune on the colour wheel
All matches: Medium German Yellow equivalents · Barren Dune equivalents