ΔE 22.5, loose: different enough that you should pick on purpose. N7 Neutral Gray is a little darker, much more muted than Grotesque Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 23). N7 Neutral Gray is a little darker, much more muted than Grotesque Green.
The same difference applies the other way round: Grotesque Green is a little lighter, much more saturated.
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 Grotesque Green on the colour wheel See N7 Neutral Gray on the colour wheel
All matches: Grotesque Green equivalents · N7 Neutral Gray equivalents