ΔE 16.3, loose: different enough that you should pick on purpose. Sketching White is noticeably lighter, much more muted than Bleached Bone.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Sketching White is noticeably lighter, much more muted than Bleached Bone.
The same difference applies the other way round: Bleached Bone is noticeably darker, much more saturated.
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 Bleached Bone on the colour wheel See Sketching White on the colour wheel
All matches: Bleached Bone equivalents · Sketching White equivalents