Abomination Gore vs Rust Orange

How close are they?

ΔE 16.4, loose: different enough that you should pick on purpose. Rust Orange is noticeably lighter, more muted, warmer than Abomination Gore.

Can I use Rust Orange instead of Abomination Gore?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Rust Orange is noticeably lighter, more muted, warmer than Abomination Gore.

Can I use Abomination Gore instead of Rust Orange?

The same difference applies the other way round: Abomination Gore is noticeably darker, 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.