Dark Neutral Grey vs Dark Grey

How close are they?

ΔE 9.1, close: similar, with a visible difference side by side. Dark Grey is a little darker, more saturated than Dark Neutral Grey.

Can I use Dark Grey instead of Dark Neutral Grey?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Dark Grey is a little darker, more saturated than Dark Neutral Grey.

Can I use Dark Neutral Grey instead of Dark Grey?

The same difference applies the other way round: Dark Neutral Grey is a little lighter, more muted.

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.