Sunset Purple vs Pink

How close are they?

ΔE 21.5, loose: different enough that you should pick on purpose. Pink is noticeably lighter, much more saturated than Sunset Purple.

Can I use Pink instead of Sunset Purple?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 21). Pink is noticeably lighter, much more saturated than Sunset Purple.

Can I use Sunset Purple instead of Pink?

The same difference applies the other way round: Sunset Purple is noticeably darker, 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.