Figgy Pink vs Hot Pink

How close are they?

ΔE 23.2, loose: different enough that you should pick on purpose. Hot Pink is noticeably darker, much more saturated than Figgy Pink.

Can I use Hot Pink instead of Figgy Pink?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 23). Hot Pink is noticeably darker, much more saturated than Figgy Pink.

Can I use Figgy Pink instead of Hot Pink?

The same difference applies the other way round: Figgy Pink is noticeably lighter, 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.