Dusk Red vs Sigvald Burgundy

How close are they?

ΔE 18.5, loose: different enough that you should pick on purpose. Sigvald Burgundy is a little darker, much more saturated, cooler than Dusk Red.

Can I use Sigvald Burgundy instead of Dusk Red?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Sigvald Burgundy is a little darker, much more saturated, cooler than Dusk Red.

Can I use Dusk Red instead of Sigvald Burgundy?

The same difference applies the other way round: Dusk Red is a little lighter, much 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.