ΔE 15.8, loose: different enough that you should pick on purpose. Grizzly Brown is a little darker, more saturated, cooler than Satchel Brown.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Grizzly Brown is a little darker, more saturated, cooler than Satchel Brown.
The same difference applies the other way round: Satchel Brown is a little lighter, 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 Satchel Brown on the colour wheel See Grizzly Brown on the colour wheel
All matches: Satchel Brown equivalents · Grizzly Brown equivalents