ΔE 7.0, close: similar, with a visible difference side by side. Stone Grey is a little darker, more muted, warmer than US Interior Yellow Green.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Stone Grey is a little darker, more muted, warmer than US Interior Yellow Green.
The same difference applies the other way round: US Interior Yellow Green is a little lighter, 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 US Interior Yellow Green on the colour wheel See Stone Grey on the colour wheel
All matches: US Interior Yellow Green equivalents · Stone Grey equivalents