ΔE 28.6, loose: different enough that you should pick on purpose. Titanium Gold is noticeably lighter, much more muted than Tainted Gold.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 29). Titanium Gold is noticeably lighter, much more muted than Tainted Gold.
The same difference applies the other way round: Tainted Gold is noticeably darker, much more saturated.
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 Titanium Gold on the colour wheel
All matches: Tainted Gold equivalents · Titanium Gold equivalents