ΔE 23.1, loose: different enough that you should pick on purpose. Squid Pink is noticeably lighter, much more saturated than Faded Plum.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 23). Squid Pink is noticeably lighter, much more saturated than Faded Plum.
The same difference applies the other way round: Faded Plum 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.
See Faded Plum on the colour wheel See Squid Pink on the colour wheel
All matches: Faded Plum equivalents · Squid Pink equivalents