ΔE 21.1, loose: different enough that you should pick on purpose. Runelord Brass is noticeably darker, more muted than Gold.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 21). Runelord Brass is noticeably darker, more muted than Gold.
The same difference applies the other way round: Gold is noticeably lighter, more saturated.
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 on the colour wheel See Runelord Brass on the colour wheel
All matches: Gold equivalents · Runelord Brass equivalents