ΔE 11.5, fair: the same colour family, but not a straight swap. Carmine Red is more saturated, cooler than Burnt Sienna.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Carmine Red is more saturated, cooler than Burnt Sienna.
The same difference applies the other way round: Burnt Sienna is 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.
See Burnt Sienna on the colour wheel See Carmine Red on the colour wheel
All matches: Burnt Sienna equivalents · Carmine Red equivalents