ΔE 10.5, fair: the same colour family, but not a straight swap. Rusty Metal is a little darker, more muted than Warplock Bronze.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Rusty Metal is a little darker, more muted than Warplock Bronze.
The same difference applies the other way round: Warplock 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 Warplock Bronze on the colour wheel See Rusty Metal on the colour wheel
All matches: Warplock Bronze equivalents · Rusty Metal equivalents