ΔE 9.0, close: similar, with a visible difference side by side. Buff is a little darker, cooler than Cerberus Brown.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Buff is a little darker, cooler than Cerberus Brown.
The same difference applies the other way round: Cerberus Brown is a little 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 Cerberus Brown on the colour wheel See Buff on the colour wheel
All matches: Cerberus Brown equivalents · Buff equivalents