ΔE 10.7, fair: the same colour family, but not a straight swap. Gorgon Brown is more muted, cooler than Dry Rust Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Gorgon Brown is more muted, cooler than Dry Rust Brown.
The same difference applies the other way round: Dry Rust Brown is more saturated, 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 Dry Rust Brown on the colour wheel See Gorgon Brown on the colour wheel
All matches: Dry Rust Brown equivalents · Gorgon Brown equivalents