Bugman's Glow vs Beige Red

How close are they?

ΔE 8.9, close: similar, with a visible difference side by side. Beige Red is a little darker, cooler than Bugman's Glow.

Can I use Beige Red instead of Bugman's Glow?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Beige Red is a little darker, cooler than Bugman's Glow.

Can I use Bugman's Glow instead of Beige Red?

The same difference applies the other way round: Bugman's Glow is a little lighter, warmer.

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.