ΔE 18.9, loose: different enough that you should pick on purpose. Snakebite Leather is a little lighter, much more muted, cooler than Hardened Leather.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Snakebite Leather is a little lighter, much more muted, cooler than Hardened Leather.
The same difference applies the other way round: Hardened Leather is a little darker, much 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 Hardened Leather on the colour wheel See Snakebite Leather on the colour wheel
All matches: Hardened Leather equivalents · Snakebite Leather equivalents