ΔE 18.4, loose: different enough that you should pick on purpose. Orange Rust is noticeably darker, warmer than Light Orange.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Orange Rust is noticeably darker, warmer than Light Orange.
The same difference applies the other way round: Light Orange is noticeably lighter, 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 Light Orange on the colour wheel See Orange Rust on the colour wheel
All matches: Light Orange equivalents · Orange Rust equivalents