ΔE 28.8, loose: different enough that you should pick on purpose. Sanguine Base is noticeably darker, cooler than Bogrin Brown.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 29). Sanguine Base is noticeably darker, cooler than Bogrin Brown.
The same difference applies the other way round: Bogrin Brown is noticeably 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 Bogrin Brown on the colour wheel See Sanguine Base on the colour wheel
All matches: Bogrin Brown equivalents · Sanguine Base equivalents