ΔE 22.3, loose: different enough that you should pick on purpose. Tan is noticeably lighter, more saturated than Brutal Brown.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 22). Tan is noticeably lighter, more saturated than Brutal Brown.
The same difference applies the other way round: Brutal Brown is noticeably darker, 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 Brutal Brown on the colour wheel See Tan on the colour wheel
All matches: Brutal Brown equivalents · Tan equivalents