ΔE 6.3, close: similar, with a visible difference side by side. Refractive Green is a little darker, cooler than Starship Filth.
Usually, if you are not matching paint already on the model. Close match (ΔE 6). Refractive Green is a little darker, cooler than Starship Filth.
The same difference applies the other way round: Starship Filth 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 Starship Filth on the colour wheel See Refractive Green on the colour wheel
All matches: Starship Filth equivalents · Refractive Green equivalents