ΔE 12.1, fair: the same colour family, but not a straight swap. Astorath Red is a little lighter, cooler than Rotbraun RAL 8012.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Astorath Red is a little lighter, cooler than Rotbraun RAL 8012.
The same difference applies the other way round: Rotbraun RAL 8012 is a little darker, 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 Rotbraun RAL 8012 on the colour wheel See Astorath Red on the colour wheel
All matches: Rotbraun RAL 8012 equivalents · Astorath Red equivalents