Sigvald Burgundy vs Deep Purple

How close are they?

ΔE 17.6, loose: different enough that you should pick on purpose. Deep Purple is a little darker, much more muted, cooler than Sigvald Burgundy.

Can I use Deep Purple instead of Sigvald Burgundy?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Deep Purple is a little darker, much more muted, cooler than Sigvald Burgundy.

Can I use Sigvald Burgundy instead of Deep Purple?

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