ΔE 25.2, loose: different enough that you should pick on purpose. Light Bismuth Yellow is noticeably lighter, more saturated, cooler than Ushabti Bone.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 25). Light Bismuth Yellow is noticeably lighter, more saturated, cooler than Ushabti Bone.
The same difference applies the other way round: Ushabti Bone is noticeably 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.
See Ushabti Bone on the colour wheel See Light Bismuth Yellow on the colour wheel
All matches: Ushabti Bone equivalents · Light Bismuth Yellow equivalents