ΔE 4.4, very close: most people won’t see a difference side by side. Gravelord Grey is a little darker than Neutral Grey. They are different kinds of paint: AMMO by Mig Neutral Grey is an opaque base/layer paint and Army Painter Gravelord Grey is a one-coat contrast-style paint, so they won’t behave the same on the model even where the colour is close.
Yes, for most jobs. Very close match (ΔE 4). Gravelord Grey is a little darker than Neutral Grey. They are different kinds of paint.
The same difference applies the other way round: Neutral Grey is a little 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.
See Neutral Grey on the colour wheel See Gravelord Grey on the colour wheel
All matches: Neutral Grey equivalents · Gravelord Grey equivalents