ΔE 10.7, fair: the same colour family, but not a straight swap. Black Grey is more muted than Chocolate (Chipping).
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Black Grey is more muted than Chocolate (Chipping).
The same difference applies the other way round: Chocolate (Chipping) is 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 Chocolate (Chipping) on the colour wheel See Black Grey on the colour wheel
All matches: Chocolate (Chipping) equivalents · Black Grey equivalents