ΔE 18.3, loose: different enough that you should pick on purpose. Succubus Skin is a little darker, much more muted, cooler than Sekigahara.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Succubus Skin is a little darker, much more muted, cooler than Sekigahara.
The same difference applies the other way round: Sekigahara is a little lighter, 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 Sekigahara on the colour wheel See Succubus Skin on the colour wheel
All matches: Sekigahara equivalents · Succubus Skin equivalents