ΔE 14.4, fair: the same colour family, but not a straight swap. Moonstone Grey is a little lighter, much more muted than Tanker Grey.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Moonstone Grey is a little lighter, much more muted than Tanker Grey.
The same difference applies the other way round: Tanker Grey is a little darker, much 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 Tanker Grey on the colour wheel See Moonstone Grey on the colour wheel
All matches: Tanker Grey equivalents · Moonstone Grey equivalents