ΔE 9.0, close: similar, with a visible difference side by side. Greenskin is a little lighter, more saturated than Space Green.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Greenskin is a little lighter, more saturated than Space Green.
The same difference applies the other way round: Space Green 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 Space Green on the colour wheel See Greenskin on the colour wheel
All matches: Space Green equivalents · Greenskin equivalents