ΔE 10.5, fair: the same colour family, but not a straight swap. Iridescent Copper Light (Fine) is a little darker, more saturated than Talos Bronze. They are different kinds of paint: Army Painter Talos Bronze is a metallic and Golden Iridescent Copper Light (Fine) is a pearl paint, so they won’t behave the same on the model even where the colour is close.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Iridescent Copper Light (Fine) is a little darker, more saturated than Talos Bronze. They are different kinds of paint.
The same difference applies the other way round: Talos Bronze is a little lighter, 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 Talos Bronze on the colour wheel See Iridescent Copper Light (Fine) on the colour wheel
All matches: Talos Bronze equivalents · Iridescent Copper Light (Fine) equivalents