ΔE 6.4, close: similar, with a visible difference side by side. Poison Green is more saturated, warmer than Steel Helmet Green.
Usually, if you are not matching paint already on the model. Close match (ΔE 6). Poison Green is more saturated, warmer than Steel Helmet Green.
The same difference applies the other way round: Steel Helmet Green is 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 Steel Helmet Green on the colour wheel See Poison Green on the colour wheel
All matches: Steel Helmet Green equivalents · Poison Green equivalents