ΔE 12.7, fair: the same colour family, but not a straight swap. Pale Blue Grey is noticeably darker than N7 Neutral Gray.
Can I use Pale Blue Grey instead of N7 Neutral Gray?
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Pale Blue Grey is noticeably darker than N7 Neutral Gray.
Can I use N7 Neutral Gray instead of Pale Blue Grey?
The same difference applies the other way round: N7 Neutral Gray 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.