Dead Pink vs Corax White

How close are they?

ΔE 17.8, loose: different enough that you should pick on purpose. Corax White is a little lighter, much more muted than Dead Pink.

Can I use Corax White instead of Dead Pink?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Corax White is a little lighter, much more muted than Dead Pink.

Can I use Dead Pink instead of Corax White?

The same difference applies the other way round: Dead Pink is a little darker, much more saturated.

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.