ΔE 44.3, loose: different enough that you should pick on purpose. Frost is noticeably lighter, more muted, cooler than Fluor Turquoise.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 44). Frost is noticeably lighter, more muted, cooler than Fluor Turquoise.
The same difference applies the other way round: Fluor Turquoise is noticeably darker, 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 Fluor Turquoise on the colour wheel See Frost on the colour wheel
All matches: Fluor Turquoise equivalents · Frost equivalents