ΔE 6.2, close: similar, with a visible difference side by side. Crusted Sore is a little darker than Night Blood.
Usually, if you are not matching paint already on the model. Close match (ΔE 6). Crusted Sore is a little darker than Night Blood.
The same difference applies the other way round: Night Blood is a little lighter.
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 Night Blood on the colour wheel See Crusted Sore on the colour wheel
All matches: Night Blood equivalents · Crusted Sore equivalents