ΔE 18.6, loose: different enough that you should pick on purpose. Terre Verte Hue is noticeably darker, more saturated than Grotesque Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Terre Verte Hue is noticeably darker, more saturated than Grotesque Green.
The same difference applies the other way round: Grotesque Green is noticeably 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 Grotesque Green on the colour wheel See Terre Verte Hue on the colour wheel
All matches: Grotesque Green equivalents · Terre Verte Hue equivalents