ΔE 7.1, close: similar, with a visible difference side by side. IDF Sand Grey is a little darker, cooler than Dusty Earth.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). IDF Sand Grey is a little darker, cooler than Dusty Earth.
The same difference applies the other way round: Dusty Earth is a little lighter, warmer.
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 Dusty Earth on the colour wheel See IDF Sand Grey on the colour wheel
All matches: Dusty Earth equivalents · IDF Sand Grey equivalents