Bison-Beast vs Ushabti Bone

How close are they?

ΔE 22.0, loose: different enough that you should pick on purpose. Ushabti Bone is a little lighter, more saturated, cooler than Bison-Beast.

Can I use Ushabti Bone instead of Bison-Beast?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 22). Ushabti Bone is a little lighter, more saturated, cooler than Bison-Beast.

Can I use Bison-Beast instead of Ushabti Bone?

The same difference applies the other way round: Bison-Beast is a little darker, more muted, 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.