ΔE 17.5, loose: different enough that you should pick on purpose. Daemonette Hide is noticeably lighter, much more muted, cooler than Octopus Purple.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Daemonette Hide is noticeably lighter, much more muted, cooler than Octopus Purple.
The same difference applies the other way round: Octopus Purple is noticeably darker, 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.
See Octopus Purple on the colour wheel See Daemonette Hide on the colour wheel
All matches: Octopus Purple equivalents · Daemonette Hide equivalents