ΔE 27.4, loose: different enough that you should pick on purpose. Light Phthalo Blue is noticeably lighter, much more muted, warmer than Plasma Coil Glow.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 27). Light Phthalo Blue is noticeably lighter, much more muted, warmer than Plasma Coil Glow.
The same difference applies the other way round: Plasma Coil Glow is noticeably darker, much 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 Light Phthalo Blue on the colour wheel
All matches: Plasma Coil Glow equivalents · Light Phthalo Blue equivalents