ΔE 34.2, loose: different enough that you should pick on purpose. Ignis Fatuus is more muted, warmer than Plasma Coil Glow.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 34). Ignis Fatuus is more muted, warmer than Plasma Coil Glow.
The same difference applies the other way round: Plasma Coil Glow is more saturated, 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 Plasma Coil Glow on the colour wheel See Ignis Fatuus on the colour wheel
All matches: Plasma Coil Glow equivalents · Ignis Fatuus equivalents