ΔE 9.4, close: similar, with a visible difference side by side. Dark Sand is a little lighter, more saturated than RAL 7028 Dunkelgelb (Variant).
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Dark Sand is a little lighter, more saturated than RAL 7028 Dunkelgelb (Variant).
The same difference applies the other way round: RAL 7028 Dunkelgelb (Variant) 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 RAL 7028 Dunkelgelb (Variant) on the colour wheel See Dark Sand on the colour wheel
All matches: RAL 7028 Dunkelgelb (Variant) equivalents · Dark Sand equivalents