Burnt Red vs Scarlet Red

How close are they?

ΔE 15.5, loose: different enough that you should pick on purpose. Scarlet Red is a little lighter, more saturated, cooler than Burnt Red.

Can I use Scarlet Red instead of Burnt Red?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Scarlet Red is a little lighter, more saturated, cooler than Burnt Red.

Can I use Burnt Red instead of Scarlet Red?

The same difference applies the other way round: Burnt Red is a little darker, more muted, 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.