ΔE 9.3, close: similar, with a visible difference side by side. Green Grey is a little darker, more muted, cooler than Fury Green.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Green Grey is a little darker, more muted, cooler than Fury Green.
The same difference applies the other way round: Fury Green is a little lighter, 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.
See Fury Green on the colour wheel See Green Grey on the colour wheel
All matches: Fury Green equivalents · Green Grey equivalents