ΔE 9.2, close: similar, with a visible difference side by side. Prussian Blue is more saturated, cooler than Broodmother Purple.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Prussian Blue is more saturated, cooler than Broodmother Purple.
The same difference applies the other way round: Broodmother Purple is more muted, warmer.
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 Broodmother Purple on the colour wheel See Prussian Blue on the colour wheel
All matches: Broodmother Purple equivalents · Prussian Blue equivalents