ΔE 21.9, loose: different enough that you should pick on purpose. Imperial Gold is much more muted, warmer than Life On Mars.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 22). Imperial Gold is much more muted, warmer than Life On Mars.
The same difference applies the other way round: Life On Mars is much more saturated, 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 Life On Mars on the colour wheel See Imperial Gold on the colour wheel
All matches: Life On Mars equivalents · Imperial Gold equivalents