ΔE 9.5, close: similar, with a visible difference side by side. Green is a little darker, cooler than Warboss Green. They are different kinds of paint: Citadel Warboss Green is an opaque base/layer paint and Green Stuff World Green is an ink, glaze or transparent paint, so they won’t behave the same on the model even where the colour is close.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Green is a little darker, cooler than Warboss Green. They are different kinds of paint.
The same difference applies the other way round: Warboss Green is a little lighter, 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 Warboss Green on the colour wheel See Green on the colour wheel
All matches: Warboss Green equivalents · Green equivalents