Moon Dust vs Megaboss Yellow

How close are they?

ΔE 8.4, close: similar, with a visible difference side by side. Megaboss Yellow is a little lighter, cooler than Moon Dust.

Can I use Megaboss Yellow instead of Moon Dust?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Megaboss Yellow is a little lighter, cooler than Moon Dust.

Can I use Moon Dust instead of Megaboss Yellow?

The same difference applies the other way round: Moon Dust 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.