Burnished Red vs Copper Brown

How close are they?

ΔE 18.0, loose: different enough that you should pick on purpose. Copper Brown is noticeably darker, more muted, cooler than Burnished Red.

Can I use Copper Brown instead of Burnished Red?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Copper Brown is noticeably darker, more muted, cooler than Burnished Red.

Can I use Burnished Red instead of Copper Brown?

The same difference applies the other way round: Burnished Red is noticeably 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.