ΔE 22.1, loose: different enough that you should pick on purpose. Glorious Gold is a little lighter, much more saturated than Metallic Medium.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 22). Glorious Gold is a little lighter, much more saturated than Metallic Medium.
The same difference applies the other way round: Metallic Medium is a little darker, much 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 Metallic Medium on the colour wheel See Glorious Gold on the colour wheel
All matches: Metallic Medium equivalents · Glorious Gold equivalents