ΔE 101.0, loose: different enough that you should pick on purpose. Acid is a little lighter, much more muted, cooler than Orange Neon.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 101). Acid is a little lighter, much more muted, cooler than Orange Neon.
The same difference applies the other way round: Orange Neon is a little darker, much 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 Orange Neon on the colour wheel See Acid on the colour wheel
All matches: Orange Neon equivalents · Acid equivalents