ΔE 11.7, fair: the same colour family, but not a straight swap. Talos Bronze is a little lighter, more muted, warmer than Copper.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Talos Bronze is a little lighter, more muted, warmer than Copper.
The same difference applies the other way round: Copper is a little darker, more saturated, 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 Copper on the colour wheel See Talos Bronze on the colour wheel
All matches: Copper equivalents · Talos Bronze equivalents