ΔE 8.4, close: similar, with a visible difference side by side. USAF Light Gray is a little lighter than Bright Warm Grey.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). USAF Light Gray is a little lighter than Bright Warm Grey.
The same difference applies the other way round: Bright Warm Grey is a little darker.
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 Bright Warm Grey on the colour wheel See USAF Light Gray on the colour wheel
All matches: Bright Warm Grey equivalents · USAF Light Gray equivalents