ΔE 8.2, close: similar, with a visible difference side by side. Park Green Flat is a little lighter, more saturated, cooler than Emerald Green.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Park Green Flat is a little lighter, more saturated, cooler than Emerald Green.
The same difference applies the other way round: Emerald Green is a little darker, more muted, 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 Emerald Green on the colour wheel See Park Green Flat on the colour wheel
All matches: Emerald Green equivalents · Park Green Flat equivalents