ΔE 50.8, loose: different enough that you should pick on purpose. Galvanic Corrosion is noticeably darker, much more muted, warmer than Fluor Yellow.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 51). Galvanic Corrosion is noticeably darker, much more muted, warmer than Fluor Yellow.
The same difference applies the other way round: Fluor Yellow is noticeably lighter, much more saturated, 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 Yellow on the colour wheel See Galvanic Corrosion on the colour wheel
All matches: Fluor Yellow equivalents · Galvanic Corrosion equivalents