ΔE 8.9, close: similar, with a visible difference side by side. Greatcoat Green is a little lighter, more saturated, warmer than RAL 7008 Graugrün Opt 2.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Greatcoat Green is a little lighter, more saturated, warmer than RAL 7008 Graugrün Opt 2.
The same difference applies the other way round: RAL 7008 Graugrün Opt 2 is a little darker, more muted, 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 RAL 7008 Graugrün Opt 2 on the colour wheel See Greatcoat Green on the colour wheel
All matches: RAL 7008 Graugrün Opt 2 equivalents · Greatcoat Green equivalents