ΔE 24.7, loose: different enough that you should pick on purpose. Bright Green is noticeably darker, warmer than Hazardous Smog.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 25). Bright Green is noticeably darker, warmer than Hazardous Smog.
The same difference applies the other way round: Hazardous Smog is noticeably lighter, 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.
See Hazardous Smog on the colour wheel See Bright Green on the colour wheel
All matches: Hazardous Smog equivalents · Bright Green equivalents