ΔE 8.8, close: similar, with a visible difference side by side. Nurgling Green is warmer than Mecha Light Green.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Nurgling Green is warmer than Mecha Light Green.
The same difference applies the other way round: Mecha Light Green is 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 Mecha Light Green on the colour wheel See Nurgling Green on the colour wheel
All matches: Mecha Light Green equivalents · Nurgling Green equivalents