ΔE 32.1, loose: different enough that you should pick on purpose. Vomit is noticeably lighter, more saturated than Fluor Orange.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 32). Vomit is noticeably lighter, more saturated than Fluor Orange.
The same difference applies the other way round: Fluor Orange is noticeably darker, more muted.
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 Orange on the colour wheel See Vomit on the colour wheel
All matches: Fluor Orange equivalents · Vomit equivalents