ΔE 26.6, loose: different enough that you should pick on purpose. Aged Metal is a little darker, more muted, cooler than Copper.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 27). Aged Metal is a little darker, more muted, cooler than Copper.
The same difference applies the other way round: Copper is a little lighter, more saturated, 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 Copper on the colour wheel See Aged Metal on the colour wheel
All matches: Copper equivalents · Aged Metal equivalents