ΔE 14.2, fair: the same colour family, but not a straight swap. Cement Grey is a little darker, more muted, warmer than Soft Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Cement Grey is a little darker, more muted, warmer than Soft Green.
The same difference applies the other way round: Soft Green is a little lighter, more saturated, 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 Soft Green on the colour wheel See Cement Grey on the colour wheel
All matches: Soft Green equivalents · Cement Grey equivalents