ΔE 16.2, loose: different enough that you should pick on purpose. Lothern Blue is noticeably darker, warmer than Plasma Coil Glow.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Lothern Blue is noticeably darker, warmer than Plasma Coil Glow.
The same difference applies the other way round: Plasma Coil Glow 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 Plasma Coil Glow on the colour wheel See Lothern Blue on the colour wheel
All matches: Plasma Coil Glow equivalents · Lothern Blue equivalents