ΔE 52.8, loose: different enough that you should pick on purpose. Fluorescent Violet is noticeably darker, more saturated, cooler than Fluor Rose.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 53). Fluorescent Violet is noticeably darker, more saturated, cooler than Fluor Rose.
The same difference applies the other way round: Fluor Rose is noticeably lighter, more muted, 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 Rose on the colour wheel See Fluorescent Violet on the colour wheel
All matches: Fluor Rose equivalents · Fluorescent Violet equivalents