Nuclear Sunrise vs Rust

How close are they?

ΔE 25.2, loose: different enough that you should pick on purpose. Rust is noticeably darker, much more muted than Nuclear Sunrise.

Can I use Rust instead of Nuclear Sunrise?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 25). Rust is noticeably darker, much more muted than Nuclear Sunrise.

Can I use Nuclear Sunrise instead of Rust?

The same difference applies the other way round: Nuclear Sunrise is noticeably lighter, 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.