Oozing Vomit vs Bright Yellow Ochre

How close are they?

ΔE 15.6, loose: different enough that you should pick on purpose. Bright Yellow Ochre is a little lighter, more muted, warmer than Oozing Vomit.

Can I use Bright Yellow Ochre instead of Oozing Vomit?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Bright Yellow Ochre is a little lighter, more muted, warmer than Oozing Vomit.

Can I use Oozing Vomit instead of Bright Yellow Ochre?

The same difference applies the other way round: Oozing Vomit is a little darker, 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.