ΔE 7.0, close: similar, with a visible difference side by side. Titan Mars Pale is warmer than Quartz Skin. They are different kinds of paint: Army Painter Quartz Skin is an opaque base/layer paint and Golden Titan Mars Pale 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 7). Titan Mars Pale is warmer than Quartz Skin. They are different kinds of paint.
The same difference applies the other way round: Quartz Skin is cooler.
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 Quartz Skin on the colour wheel See Titan Mars Pale on the colour wheel
All matches: Quartz Skin equivalents · Titan Mars Pale equivalents