ΔE 10.1, fair: the same colour family, but not a straight swap. Fire Red is a little lighter, more muted, cooler than RAL 8012 Rotbraun.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Fire Red is a little lighter, more muted, cooler than RAL 8012 Rotbraun.
The same difference applies the other way round: RAL 8012 Rotbraun is a little darker, more saturated, 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 RAL 8012 Rotbraun on the colour wheel See Fire Red on the colour wheel
All matches: RAL 8012 Rotbraun equivalents · Fire Red equivalents