ΔE 12.3, fair: the same colour family, but not a straight swap. Solar Flare is a little darker, more saturated, warmer than Radiation Glow.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Solar Flare is a little darker, more saturated, warmer than Radiation Glow.
The same difference applies the other way round: Radiation Glow is a little lighter, more muted, 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 Radiation Glow on the colour wheel See Solar Flare on the colour wheel
All matches: Radiation Glow equivalents · Solar Flare equivalents