ΔE 17.0, loose: different enough that you should pick on purpose. Interior Blue Soviet is a little darker, cooler than Toxic Mist.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Interior Blue Soviet is a little darker, cooler than Toxic Mist.
The same difference applies the other way round: Toxic Mist is a little lighter, 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 Toxic Mist on the colour wheel See Interior Blue Soviet on the colour wheel
All matches: Toxic Mist equivalents · Interior Blue Soviet equivalents