ΔE 22.1, loose: different enough that you should pick on purpose. Gold Dust Woman is a little darker, much more saturated, warmer than Cosmic Dust.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 22). Gold Dust Woman is a little darker, much more saturated, warmer than Cosmic Dust.
The same difference applies the other way round: Cosmic Dust is a little lighter, much 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.
See Cosmic Dust on the colour wheel See Gold Dust Woman on the colour wheel
All matches: Cosmic Dust equivalents · Gold Dust Woman equivalents