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