ΔE 6.7, close: similar, with a visible difference side by side. Fresh Rust is a little lighter, more muted than Red Brick.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Fresh Rust is a little lighter, more muted than Red Brick.
The same difference applies the other way round: Red Brick is a little darker, 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 Red Brick on the colour wheel See Fresh Rust on the colour wheel
All matches: Red Brick equivalents · Fresh Rust equivalents