ΔE 24.0, loose: different enough that you should pick on purpose. Fluorescent Yellow is a little lighter, more saturated, cooler than Fluorescent Orange-Yellow.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 24). Fluorescent Yellow is a little lighter, more saturated, cooler than Fluorescent Orange-Yellow.
The same difference applies the other way round: Fluorescent Orange-Yellow is a little 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 Fluorescent Orange-Yellow on the colour wheel See Fluorescent Yellow on the colour wheel
All matches: Fluorescent Orange-Yellow equivalents · Fluorescent Yellow equivalents