ΔE 20.3, loose: different enough that you should pick on purpose. Runic Gold is a little lighter, much more saturated, cooler than Balthasar Gold.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 20). Runic Gold is a little lighter, much more saturated, cooler than Balthasar Gold.
The same difference applies the other way round: Balthasar Gold is a little darker, much more muted, 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 Balthasar Gold on the colour wheel See Runic Gold on the colour wheel
All matches: Balthasar Gold equivalents · Runic Gold equivalents