ΔE 15.0, loose: different enough that you should pick on purpose. Wolf Grey is noticeably lighter, more muted, cooler than The Fang.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Wolf Grey is noticeably lighter, more muted, cooler than The Fang.
The same difference applies the other way round: The Fang is noticeably 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 The Fang on the colour wheel See Wolf Grey on the colour wheel
All matches: The Fang equivalents · Wolf Grey equivalents