ΔE 8.9, close: similar, with a visible difference side by side. USAF Light Gray is a little darker than N8 Neutral Gray.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). USAF Light Gray is a little darker than N8 Neutral Gray.
The same difference applies the other way round: N8 Neutral Gray 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 N8 Neutral Gray on the colour wheel See USAF Light Gray on the colour wheel
All matches: N8 Neutral Gray equivalents · USAF Light Gray equivalents