ΔE 18.5, loose: different enough that you should pick on purpose. Brutal Brown is noticeably darker, more muted, cooler than Deathclaw Brown.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Brutal Brown is noticeably darker, more muted, cooler than Deathclaw Brown.
The same difference applies the other way round: Deathclaw Brown is noticeably lighter, more saturated, 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 Deathclaw Brown on the colour wheel See Brutal Brown on the colour wheel
All matches: Deathclaw Brown equivalents · Brutal Brown equivalents