ΔE 8.0, close: similar, with a visible difference side by side. Ink Skin is more saturated than Dark Skin Wash. They are different kinds of paint: Army Painter Dark Skin Wash is a wash/shade and Vallejo Ink Skin is an ink, glaze or transparent paint, so they won’t behave the same on the model even where the colour is close.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Ink Skin is more saturated than Dark Skin Wash. They are different kinds of paint.
The same difference applies the other way round: Dark Skin Wash is 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.
See Dark Skin Wash on the colour wheel See Ink Skin on the colour wheel
All matches: Dark Skin Wash equivalents · Ink Skin equivalents