ΔE 12.6, fair: the same colour family, but not a straight swap. Middle Stone is noticeably darker, cooler than Baneblade Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Middle Stone is noticeably darker, cooler than Baneblade Brown.
The same difference applies the other way round: Baneblade Brown is noticeably lighter, warmer.
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 Baneblade Brown on the colour wheel See Middle Stone on the colour wheel
All matches: Baneblade Brown equivalents · Middle Stone equivalents