ΔE 12.4, fair: the same colour family, but not a straight swap. Beret Maroon is more saturated than Cardinal Purple.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Beret Maroon is more saturated than Cardinal Purple.
The same difference applies the other way round: Cardinal Purple is 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 Cardinal Purple on the colour wheel See Beret Maroon on the colour wheel
All matches: Cardinal Purple equivalents · Beret Maroon equivalents