ΔE 33.3, loose: different enough that you should pick on purpose. Vomit is noticeably lighter, more muted than Orange Fluor.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 33). Vomit is noticeably lighter, more muted than Orange Fluor.
The same difference applies the other way round: Orange Fluor is noticeably darker, more saturated.
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 Orange Fluor on the colour wheel See Vomit on the colour wheel
All matches: Orange Fluor equivalents · Vomit equivalents