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