Space Dust vs Zamesi Desert

How close are they?

ΔE 27.9, loose: different enough that you should pick on purpose. Zamesi Desert is noticeably darker, more saturated, warmer than Space Dust.

Can I use Zamesi Desert instead of Space Dust?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 28). Zamesi Desert is noticeably darker, more saturated, warmer than Space Dust.

Can I use Space Dust instead of Zamesi Desert?

The same difference applies the other way round: Space Dust is noticeably lighter, more muted, 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.