ΔE 11.8, fair: the same colour family, but not a straight swap. Gold Brown is a little darker, warmer than Gold Rush.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Gold Brown is a little darker, warmer than Gold Rush.
The same difference applies the other way round: Gold Rush is a little 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 Gold Rush on the colour wheel See Gold Brown on the colour wheel
All matches: Gold Rush equivalents · Gold Brown equivalents