ΔE 21.2, loose: different enough that you should pick on purpose. Hulky Green is a little darker, more muted, cooler than Acid Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 21). Hulky Green is a little darker, more muted, cooler than Acid Green.
The same difference applies the other way round: Acid Green is a little lighter, more saturated, warmer.
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 Acid Green on the colour wheel See Hulky Green on the colour wheel
All matches: Acid Green equivalents · Hulky Green equivalents