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