ΔE 59.3, loose: different enough that you should pick on purpose. Fluorescent Green is noticeably lighter, much more saturated, warmer than Fluor Turquoise.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 59). Fluorescent Green is noticeably lighter, much more saturated, warmer than Fluor Turquoise.
The same difference applies the other way round: Fluor Turquoise is noticeably darker, much more muted, 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 Fluor Turquoise on the colour wheel See Fluorescent Green on the colour wheel
All matches: Fluor Turquoise equivalents · Fluorescent Green equivalents