ΔE 19.4, loose: different enough that you should pick on purpose. Off-White is noticeably lighter, more muted, cooler than Vampire Fang.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Off-White is noticeably lighter, more muted, cooler than Vampire Fang.
The same difference applies the other way round: Vampire Fang is noticeably darker, 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 Vampire Fang on the colour wheel See Off-White on the colour wheel
All matches: Vampire Fang equivalents · Off-White equivalents