ΔE 7.7, close: similar, with a visible difference side by side. German Red Brown is a little lighter, more muted, warmer than Scab Red.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). German Red Brown is a little lighter, more muted, warmer than Scab Red.
The same difference applies the other way round: Scab Red is a little darker, 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 Scab Red on the colour wheel See German Red Brown on the colour wheel
All matches: Scab Red equivalents · German Red Brown equivalents