ΔE 16.8, loose: different enough that you should pick on purpose. N6 Neutral Gray is noticeably darker, more muted than Briar Queen Chill. They are different kinds of paint: Citadel Briar Queen Chill is a one-coat contrast-style paint and Golden N6 Neutral Gray is an opaque base/layer paint, so they won’t behave the same on the model even where the colour is close.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). N6 Neutral Gray is noticeably darker, more muted than Briar Queen Chill. They are different kinds of paint.
The same difference applies the other way round: Briar Queen Chill is noticeably lighter, more saturated.
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 Briar Queen Chill on the colour wheel See N6 Neutral Gray on the colour wheel
All matches: Briar Queen Chill equivalents · N6 Neutral Gray equivalents