ΔE 9.5, close: similar, with a visible difference side by side. Grey Green is a little lighter, more saturated than Dawnstone.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). Grey Green is a little lighter, more saturated than Dawnstone.
The same difference applies the other way round: Dawnstone 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 Dawnstone on the colour wheel See Grey Green on the colour wheel
All matches: Dawnstone equivalents · Grey Green equivalents