ΔE 9.9, close: similar, with a visible difference side by side. Pure Orange is a little darker, more saturated than Radiation Glow.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). Pure Orange is a little darker, more saturated than Radiation Glow.
The same difference applies the other way round: Radiation Glow is a little lighter, more muted.
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 Pure Orange on the colour wheel
All matches: Radiation Glow equivalents · Pure Orange equivalents