Deep Violet vs Enchanted Pink

How close are they?

ΔE 19.4, loose: different enough that you should pick on purpose. Enchanted Pink is noticeably darker, warmer than Deep Violet.

Can I use Enchanted Pink instead of Deep Violet?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Enchanted Pink is noticeably darker, warmer than Deep Violet.

Can I use Deep Violet instead of Enchanted Pink?

The same difference applies the other way round: Deep Violet is noticeably lighter, cooler.

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.