ΔE 12.5, fair: the same colour family, but not a straight swap. Sterling Silver is a little darker, more muted than Motherlode.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Sterling Silver is a little darker, more muted than Motherlode.
The same difference applies the other way round: Motherlode is a little 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 Motherlode on the colour wheel See Sterling Silver on the colour wheel
All matches: Motherlode equivalents · Sterling Silver equivalents