ΔE 32.6, loose: different enough that you should pick on purpose. Squid Pink is noticeably lighter, more saturated, warmer than Smalt Hue.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 33). Squid Pink is noticeably lighter, more saturated, warmer than Smalt Hue.
The same difference applies the other way round: Smalt Hue is noticeably darker, more muted, 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.
See Smalt Hue on the colour wheel See Squid Pink on the colour wheel
All matches: Smalt Hue equivalents · Squid Pink equivalents