ΔE 21.7, loose: different enough that you should pick on purpose. Sterling Silver is noticeably lighter, more muted than Sparkling Amethyst.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 22). Sterling Silver is noticeably lighter, more muted than Sparkling Amethyst.
The same difference applies the other way round: Sparkling Amethyst is noticeably darker, 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 Sparkling Amethyst on the colour wheel See Sterling Silver on the colour wheel
All matches: Sparkling Amethyst equivalents · Sterling Silver equivalents