ΔE 11.7, fair: the same colour family, but not a straight swap. Steel (Metallic) is noticeably lighter than Super Silver.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Steel (Metallic) is noticeably lighter than Super Silver.
The same difference applies the other way round: Super Silver is noticeably darker.
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 Super Silver on the colour wheel See Steel (Metallic) on the colour wheel
All matches: Super Silver equivalents · Steel (Metallic) equivalents