Burnt Metal vs True Copper

How close are they?

ΔE 25.8, loose: different enough that you should pick on purpose. True Copper is much more saturated, warmer than Burnt Metal.

Can I use True Copper instead of Burnt Metal?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 26). True Copper is much more saturated, warmer than Burnt Metal.

Can I use Burnt Metal instead of True Copper?

The same difference applies the other way round: Burnt Metal is much more muted, 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.