ΔE 9.8, close: similar, with a visible difference side by side. Faust Blue is a little lighter, more muted than Dark Reaper.
✓ Two Thin Coats comparison chart lists these two as equivalents.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). Faust Blue is a little lighter, more muted than Dark Reaper.
The same difference applies the other way round: Dark Reaper is a little darker, more saturated.
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 Dark Reaper on the colour wheel See Faust Blue on the colour wheel
All matches: Dark Reaper equivalents · Faust Blue equivalents