ΔE 24.4, loose: different enough that you should pick on purpose. The Fang is much more saturated than Hell Bent for Leather.
Can I use The Fang instead of Hell Bent for Leather?
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 24). The Fang is much more saturated than Hell Bent for Leather.
Can I use Hell Bent for Leather instead of The Fang?
The same difference applies the other way round: Hell Bent for Leather is much more muted.
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.