ΔE 7.3, close: similar, with a visible difference side by side. Greenish Gold is a little lighter, cooler than Runelord Brass.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Greenish Gold is a little lighter, cooler than Runelord Brass.
The same difference applies the other way round: Runelord Brass is a little darker, 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 Runelord Brass on the colour wheel See Greenish Gold on the colour wheel
All matches: Runelord Brass equivalents · Greenish Gold equivalents