ΔE 27.4, loose: different enough that you should pick on purpose. Bloodstone is more muted, warmer than Blood Thorn.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 27). Bloodstone is more muted, warmer than Blood Thorn.
The same difference applies the other way round: Blood Thorn is 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 Blood Thorn on the colour wheel See Bloodstone on the colour wheel
All matches: Blood Thorn equivalents · Bloodstone equivalents