ΔE 26.1, loose: different enough that you should pick on purpose. Sigvald Burgundy is noticeably darker, warmer than Moody Mauve.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 26). Sigvald Burgundy is noticeably darker, warmer than Moody Mauve.
The same difference applies the other way round: Moody Mauve is noticeably lighter, 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.
See Moody Mauve on the colour wheel See Sigvald Burgundy on the colour wheel
All matches: Moody Mauve equivalents · Sigvald Burgundy equivalents