ΔE 28.1, loose: different enough that you should pick on purpose. Ink Dark Turquoise is noticeably darker, much more muted, cooler than Inktense Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 28). Ink Dark Turquoise is noticeably darker, much more muted, cooler than Inktense Green.
The same difference applies the other way round: Inktense Green is noticeably lighter, much more saturated, 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 Inktense Green on the colour wheel See Ink Dark Turquoise on the colour wheel
All matches: Inktense Green equivalents · Ink Dark Turquoise equivalents