ΔE 7.1, close: similar, with a visible difference side by side. Buff is a little lighter, warmer than Baneblade Brown.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Buff is a little lighter, warmer than Baneblade Brown.
The same difference applies the other way round: Baneblade Brown is a little darker, 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 Baneblade Brown on the colour wheel See Buff on the colour wheel
All matches: Baneblade Brown equivalents · Buff equivalents