ΔE 12.9, fair: the same colour family, but not a straight swap. Aged Metal is a little lighter, more muted, cooler than Amber Alchemy.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Aged Metal is a little lighter, more muted, cooler than Amber Alchemy.
The same difference applies the other way round: Amber Alchemy is a little darker, 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 Amber Alchemy on the colour wheel See Aged Metal on the colour wheel
All matches: Amber Alchemy equivalents · Aged Metal equivalents