ΔE 7.7, close: similar, with a visible difference side by side. Matt Light Rust is more muted than Light Rust.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Matt Light Rust is more muted than Light Rust.
The same difference applies the other way round: Light Rust is 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.
See Light Rust on the colour wheel See Matt Light Rust on the colour wheel
All matches: Light Rust equivalents · Matt Light Rust equivalents