ΔE 13.0, fair: the same colour family, but not a straight swap. Balthasar Gold is a little lighter, more saturated, warmer than Rusty Gold.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Balthasar Gold is a little lighter, more saturated, warmer than Rusty Gold.
The same difference applies the other way round: Rusty Gold is a little darker, more muted, 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 Rusty Gold on the colour wheel See Balthasar Gold on the colour wheel
All matches: Rusty Gold equivalents · Balthasar Gold equivalents