ΔE 13.0, fair: the same colour family, but not a straight swap. Firethorn Brown is a little darker, more muted, warmer than Angron Red Clear.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Firethorn Brown is a little darker, more muted, warmer than Angron Red Clear.
The same difference applies the other way round: Angron Red Clear is a little lighter, 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 Angron Red Clear on the colour wheel See Firethorn Brown on the colour wheel
All matches: Angron Red Clear equivalents · Firethorn Brown equivalents