ΔE 18.7, loose: different enough that you should pick on purpose. Reddish Flesh is noticeably lighter, more saturated, cooler than Deathclaw Brown.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Reddish Flesh is noticeably lighter, more saturated, cooler than Deathclaw Brown.
The same difference applies the other way round: Deathclaw Brown is noticeably darker, more muted, 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 Reddish Flesh on the colour wheel
All matches: Deathclaw Brown equivalents · Reddish Flesh equivalents