ΔE 22.8, loose: different enough that you should pick on purpose. Bright Gold is noticeably lighter, more saturated than Tainted Gold.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 23). Bright Gold is noticeably lighter, more saturated than Tainted Gold.
The same difference applies the other way round: Tainted Gold is noticeably darker, more muted.
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 Tainted Gold on the colour wheel See Bright Gold on the colour wheel
All matches: Tainted Gold equivalents · Bright Gold equivalents