ΔE 6.9, close: similar, with a visible difference side by side. Dark Rust is a little darker, cooler than Traitor Red.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Dark Rust is a little darker, cooler than Traitor Red.
The same difference applies the other way round: Traitor Red is a little 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.
See Traitor Red on the colour wheel See Dark Rust on the colour wheel
All matches: Traitor Red equivalents · Dark Rust equivalents