ΔE 9.6, close: similar, with a visible difference side by side. Flanker Light Blue is a little darker, warmer than Toxic Mist.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). Flanker Light Blue is a little darker, warmer than Toxic Mist.
The same difference applies the other way round: Toxic Mist is a little 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 Toxic Mist on the colour wheel See Flanker Light Blue on the colour wheel
All matches: Toxic Mist equivalents · Flanker Light Blue equivalents