Orchid vs Enchanted Pink

How close are they?

ΔE 17.0, loose: different enough that you should pick on purpose. Enchanted Pink is a little lighter, much more muted than Orchid.

Can I use Enchanted Pink instead of Orchid?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Enchanted Pink is a little lighter, much more muted than Orchid.

Can I use Orchid instead of Enchanted Pink?

The same difference applies the other way round: Orchid 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.