ΔE 10.1, fair: the same colour family, but not a straight swap. USN Light Ghost Grey is a little darker than Glass Moon Light.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). USN Light Ghost Grey is a little darker than Glass Moon Light.
The same difference applies the other way round: Glass Moon Light is a little lighter.
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 Glass Moon Light on the colour wheel See USN Light Ghost Grey on the colour wheel
All matches: Glass Moon Light equivalents · USN Light Ghost Grey equivalents