ΔE 51.4, loose: different enough that you should pick on purpose. Demon Brown is noticeably darker, much more muted, warmer than Volupus Pink.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 51). Demon Brown is noticeably darker, much more muted, warmer than Volupus Pink.
The same difference applies the other way round: Volupus Pink is noticeably lighter, much more saturated, 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 Volupus Pink on the colour wheel See Demon Brown on the colour wheel
All matches: Volupus Pink equivalents · Demon Brown equivalents