ΔE 11.9, fair: the same colour family, but not a straight swap. Light Gull Gray is noticeably darker than Bright Neutral Grey.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Light Gull Gray is noticeably darker than Bright Neutral Grey.
The same difference applies the other way round: Bright Neutral Grey is noticeably 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 Bright Neutral Grey on the colour wheel See Light Gull Gray on the colour wheel
All matches: Bright Neutral Grey equivalents · Light Gull Gray equivalents