ΔE 6.6, close: similar, with a visible difference side by side. Vampire Fang is a little lighter, more muted, cooler than Ionrach Skin.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Vampire Fang is a little lighter, more muted, cooler than Ionrach Skin.
The same difference applies the other way round: Ionrach Skin is a little darker, more saturated, warmer.
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 Ionrach Skin on the colour wheel See Vampire Fang on the colour wheel
All matches: Ionrach Skin equivalents · Vampire Fang equivalents