ΔE 22.8, loose: different enough that you should pick on purpose. Cold White is noticeably lighter, more muted than Sand Grey.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 23). Cold White is noticeably lighter, more muted than Sand Grey.
The same difference applies the other way round: Sand Grey is noticeably darker, 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 Sand Grey on the colour wheel See Cold White on the colour wheel
All matches: Sand Grey equivalents · Cold White equivalents