Lollipop Magenta vs Pink

How close are they?

ΔE 26.8, loose: different enough that you should pick on purpose. Pink is much more muted, cooler than Lollipop Magenta.

Can I use Pink instead of Lollipop Magenta?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 27). Pink is much more muted, cooler than Lollipop Magenta.

Can I use Lollipop Magenta instead of Pink?

The same difference applies the other way round: Lollipop Magenta is much more saturated, warmer.

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.