ΔE 13.1, fair: the same colour family, but not a straight swap. Brass is noticeably darker than Ancient Bronze.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Brass is noticeably darker than Ancient Bronze.
The same difference applies the other way round: Ancient Bronze is noticeably lighter.
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 Ancient Bronze on the colour wheel See Brass on the colour wheel
All matches: Ancient Bronze equivalents · Brass equivalents