ΔE 7.7, close: similar, with a visible difference side by side. Deathclaw Brown is more saturated than Bullwhack Brown.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Deathclaw Brown is more saturated than Bullwhack Brown.
The same difference applies the other way round: Bullwhack Brown is more muted.
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 Bullwhack Brown on the colour wheel See Deathclaw Brown on the colour wheel
All matches: Bullwhack Brown equivalents · Deathclaw Brown equivalents