ΔE 14.7, fair: the same colour family, but not a straight swap. Fulgurite Copper is a little darker, more muted than Weapon Bronze.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Fulgurite Copper is a little darker, more muted than Weapon Bronze.
The same difference applies the other way round: Weapon Bronze is a little 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 Weapon Bronze on the colour wheel See Fulgurite Copper on the colour wheel
All matches: Weapon Bronze equivalents · Fulgurite Copper equivalents