ΔE 48.0, loose: different enough that you should pick on purpose. Fluorescent Yellow is noticeably lighter, more saturated, cooler than Light Orange Fluor.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 48). Fluorescent Yellow is noticeably lighter, more saturated, cooler than Light Orange Fluor.
The same difference applies the other way round: Light Orange Fluor is noticeably darker, 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 Light Orange Fluor on the colour wheel See Fluorescent Yellow on the colour wheel
All matches: Light Orange Fluor equivalents · Fluorescent Yellow equivalents