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