RLM 79 (1942) vs Bugman's Glow

How close are they?

ΔE 10.5, fair: the same colour family, but not a straight swap. Bugman's Glow is a little lighter, cooler than RLM 79 (1942).

Can I use Bugman's Glow instead of RLM 79 (1942)?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Bugman's Glow is a little lighter, cooler than RLM 79 (1942).

Can I use RLM 79 (1942) instead of Bugman's Glow?

The same difference applies the other way round: RLM 79 (1942) is a little darker, 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.