ΔE 18.5, loose: different enough that you should pick on purpose. Arcane Gold is a little darker, much more saturated, warmer than Metallic Gold.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Arcane Gold is a little darker, much more saturated, warmer than Metallic Gold.
The same difference applies the other way round: Metallic Gold is a little lighter, much more muted, 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 Metallic Gold on the colour wheel See Arcane Gold on the colour wheel
All matches: Metallic Gold equivalents · Arcane Gold equivalents