ΔE 21.3, loose: different enough that you should pick on purpose. Sterling Silver is a little lighter, more muted than Radiant Platinum.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 21). Sterling Silver is a little lighter, more muted than Radiant Platinum.
The same difference applies the other way round: Radiant Platinum is a little 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 Radiant Platinum on the colour wheel See Sterling Silver on the colour wheel
All matches: Radiant Platinum equivalents · Sterling Silver equivalents