ΔE 16.1, loose: different enough that you should pick on purpose. Blackroot Grey is a little lighter, much more muted than Blanched Berry.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Blackroot Grey is a little lighter, much more muted than Blanched Berry.
The same difference applies the other way round: Blanched Berry is a little darker, much 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 Blanched Berry on the colour wheel See Blackroot Grey on the colour wheel
All matches: Blanched Berry equivalents · Blackroot Grey equivalents