ΔE 11.9, fair: the same colour family, but not a straight swap. Flak Gun Yellow is a little lighter, more muted than Oozing Vomit.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Flak Gun Yellow is a little lighter, more muted than Oozing Vomit.
The same difference applies the other way round: Oozing Vomit is a little 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 Oozing Vomit on the colour wheel See Flak Gun Yellow on the colour wheel
All matches: Oozing Vomit equivalents · Flak Gun Yellow equivalents