ΔE 21.4, loose: different enough that you should pick on purpose. Rosy Flesh is a little darker, much more saturated, warmer than Sand Grey.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 21). Rosy Flesh is a little darker, much more saturated, warmer than Sand Grey.
The same difference applies the other way round: Sand Grey is a little lighter, much more muted, 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 Sand Grey on the colour wheel See Rosy Flesh on the colour wheel
All matches: Sand Grey equivalents · Rosy Flesh equivalents