ΔE 6.7, close: similar, with a visible difference side by side. Hierotek Green is a little darker, more saturated than Guardian Green.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Hierotek Green is a little darker, more saturated than Guardian Green.
The same difference applies the other way round: Guardian Green is a little lighter, 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 Guardian Green on the colour wheel See Hierotek Green on the colour wheel
All matches: Guardian Green equivalents · Hierotek Green equivalents