Dusty Earth vs Stone Grey

How close are they?

ΔE 7.9, close: similar, with a visible difference side by side. Stone Grey is a little lighter, more muted, cooler than Dusty Earth.

Can I use Stone Grey instead of Dusty Earth?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Stone Grey is a little lighter, more muted, cooler than Dusty Earth.

Can I use Dusty Earth instead of Stone Grey?

The same difference applies the other way round: Dusty Earth is a little darker, more saturated, 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.