ΔE 23.2, loose: different enough that you should pick on purpose. Greenish Gold is noticeably lighter, much more saturated, cooler than Titanium Gold.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 23). Greenish Gold is noticeably lighter, much more saturated, cooler than Titanium Gold.
The same difference applies the other way round: Titanium Gold is noticeably darker, much more muted, warmer.
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 Titanium Gold on the colour wheel See Greenish Gold on the colour wheel
All matches: Titanium Gold equivalents · Greenish Gold equivalents