ΔE 7.3, close: similar, with a visible difference side by side. Straken Green is a little lighter than Zinc Chromate Green.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Straken Green is a little lighter than Zinc Chromate Green.
The same difference applies the other way round: Zinc Chromate Green 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 Zinc Chromate Green on the colour wheel See Straken Green on the colour wheel
All matches: Zinc Chromate Green equivalents · Straken Green equivalents