ΔE 13.6, fair: the same colour family, but not a straight swap. Stormhost Silver is noticeably darker than Light Metal.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Stormhost Silver is noticeably darker than Light Metal.
The same difference applies the other way round: Light Metal is noticeably lighter.
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 Light Metal on the colour wheel See Stormhost Silver on the colour wheel
All matches: Light Metal equivalents · Stormhost Silver equivalents