ΔE 10.1, fair: the same colour family, but not a straight swap. Neutral Grey is a little lighter than N3 Neutral Gray.
Can I use Neutral Grey instead of N3 Neutral Gray?
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Neutral Grey is a little lighter than N3 Neutral Gray.
Can I use N3 Neutral Gray instead of Neutral Grey?
The same difference applies the other way round: N3 Neutral Gray 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.