Moon Dust vs Cerberus Brown

How close are they?

ΔE 21.4, loose: different enough that you should pick on purpose. Cerberus Brown is noticeably darker, much more muted, warmer than Moon Dust.

Can I use Cerberus Brown instead of Moon Dust?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 21). Cerberus Brown is noticeably darker, much more muted, warmer than Moon Dust.

Can I use Moon Dust instead of Cerberus Brown?

The same difference applies the other way round: Moon Dust is noticeably lighter, much more saturated, cooler.

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.