ΔE 9.4, close: similar, with a visible difference side by side. Cold Flesh is more muted than Slaanesh Grey.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Cold Flesh is more muted than Slaanesh Grey.
The same difference applies the other way round: Slaanesh Grey is 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 Slaanesh Grey on the colour wheel See Cold Flesh on the colour wheel
All matches: Slaanesh Grey equivalents · Cold Flesh equivalents