ΔE 18.8, loose: different enough that you should pick on purpose. Silver is noticeably darker, more muted than Tinmetal Grey.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Silver is noticeably darker, more muted than Tinmetal Grey.
The same difference applies the other way round: Tinmetal Grey is noticeably lighter, more saturated.
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 Tinmetal Grey on the colour wheel See Silver on the colour wheel
All matches: Tinmetal Grey equivalents · Silver equivalents