ΔE 13.6, fair: the same colour family, but not a straight swap. Grey is a little darker, more muted than Leather White.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Grey is a little darker, more muted than Leather White.
The same difference applies the other way round: Leather White 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 Leather White on the colour wheel See Grey on the colour wheel
All matches: Leather White equivalents · Grey equivalents