ΔE 9.2, close: similar, with a visible difference side by side. Auric Armour Gold is more saturated than Old Gold.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Auric Armour Gold is more saturated than Old Gold.
The same difference applies the other way round: Old Gold is more muted.
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 Old Gold on the colour wheel See Auric Armour Gold on the colour wheel
All matches: Old Gold equivalents · Auric Armour Gold equivalents