ΔE 8.6, close: similar, with a visible difference side by side. Chestnut Gold is a little lighter, more muted, warmer than Balthasar Gold.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Chestnut Gold is a little lighter, more muted, warmer than Balthasar Gold.
The same difference applies the other way round: Balthasar Gold is a little darker, more saturated, 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 Balthasar Gold on the colour wheel See Chestnut Gold on the colour wheel
All matches: Balthasar Gold equivalents · Chestnut Gold equivalents