ΔE 13.2, fair: the same colour family, but not a straight swap. N6 Neutral Gray is noticeably lighter than Uniform Grey.
Can I use N6 Neutral Gray instead of Uniform Grey?
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). N6 Neutral Gray is noticeably lighter than Uniform Grey.
Can I use Uniform Grey instead of N6 Neutral Gray?
The same difference applies the other way round: Uniform Grey is noticeably 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.