ΔE 8.7, close: similar, with a visible difference side by side. Pale Blue is a little darker, more saturated than Glass Moon Light.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Pale Blue is a little darker, more saturated than Glass Moon Light.
The same difference applies the other way round: Glass Moon Light is a little lighter, 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 Glass Moon Light on the colour wheel See Pale Blue on the colour wheel
All matches: Glass Moon Light equivalents · Pale Blue equivalents