ΔE 18.9, loose: different enough that you should pick on purpose. Ushabti Bone is noticeably darker, warmer than Cremeweiss RAL 9001.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Ushabti Bone is noticeably darker, warmer than Cremeweiss RAL 9001.
The same difference applies the other way round: Cremeweiss RAL 9001 is noticeably lighter, cooler.
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 Cremeweiss RAL 9001 on the colour wheel See Ushabti Bone on the colour wheel
All matches: Cremeweiss RAL 9001 equivalents · Ushabti Bone equivalents