Sycorax Bronze vs Life On Mars

How close are they?

ΔE 26.9, loose: different enough that you should pick on purpose. Life On Mars is noticeably darker, cooler than Sycorax Bronze.

Can I use Life On Mars instead of Sycorax Bronze?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 27). Life On Mars is noticeably darker, cooler than Sycorax Bronze.

Can I use Sycorax Bronze instead of Life On Mars?

The same difference applies the other way round: Sycorax Bronze is noticeably lighter, 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.