ΔE 14.0, fair: the same colour family, but not a straight swap. Radiant Platinum is much more saturated than Polished Silver.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Radiant Platinum is much more saturated than Polished Silver.
The same difference applies the other way round: Polished Silver is much more muted.
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 Polished Silver on the colour wheel See Radiant Platinum on the colour wheel
All matches: Polished Silver equivalents · Radiant Platinum equivalents