ΔE 6.6, close: similar, with a visible difference side by side. Doom Metal is a little darker, more saturated than Broadsword Silver.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Doom Metal is a little darker, more saturated than Broadsword Silver.
The same difference applies the other way round: Broadsword Silver is a little lighter, more muted.
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 Broadsword Silver on the colour wheel See Doom Metal on the colour wheel
All matches: Broadsword Silver equivalents · Doom Metal equivalents