ΔE 14.3, fair: the same colour family, but not a straight swap. Brassy Brass is more saturated than Stormhost Silver.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Brassy Brass is more saturated than Stormhost Silver.
The same difference applies the other way round: Stormhost Silver is 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 Stormhost Silver on the colour wheel See Brassy Brass on the colour wheel
All matches: Stormhost Silver equivalents · Brassy Brass equivalents