White Scar vs Carnal Pink

How close are they?

ΔE 15.6, loose: different enough that you should pick on purpose. Carnal Pink is a little darker, much more saturated than White Scar.

Can I use Carnal Pink instead of White Scar?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Carnal Pink is a little darker, much more saturated than White Scar.

Can I use White Scar instead of Carnal Pink?

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