ΔE 16.2, loose: different enough that you should pick on purpose. Polished Bone is a little lighter, much more saturated than Company Grey.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Polished Bone is a little lighter, much more saturated than Company Grey.
The same difference applies the other way round: Company Grey is a little darker, much more muted.
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 Company Grey on the colour wheel See Polished Bone on the colour wheel
All matches: Company Grey equivalents · Polished Bone equivalents