ΔE 10.3, fair: the same colour family, but not a straight swap. Ink Magenta is a little lighter, more saturated than Sigvald Burgundy. They are different kinds of paint: Citadel Sigvald Burgundy is a one-coat contrast-style paint and Vallejo Ink Magenta is an ink, glaze or transparent paint, so they won’t behave the same on the model even where the colour is close.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Ink Magenta is a little lighter, more saturated than Sigvald Burgundy. They are different kinds of paint.
The same difference applies the other way round: Sigvald Burgundy is a little darker, more muted.
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 Sigvald Burgundy on the colour wheel See Ink Magenta on the colour wheel
All matches: Sigvald Burgundy equivalents · Ink Magenta equivalents