ΔE 8.0, close: similar, with a visible difference side by side. Primary Yellow is a little lighter, more muted than Lens Flare Glow.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Primary Yellow is a little lighter, more muted than Lens Flare Glow.
The same difference applies the other way round: Lens Flare Glow is a little darker, more saturated.
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 Lens Flare Glow on the colour wheel See Primary Yellow on the colour wheel
All matches: Lens Flare Glow equivalents · Primary Yellow equivalents