ΔE 19.7, loose: different enough that you should pick on purpose. Ochre Brown is noticeably darker, much more saturated than Bone Khaki.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 20). Ochre Brown is noticeably darker, much more saturated than Bone Khaki.
The same difference applies the other way round: Bone Khaki is noticeably lighter, much 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 Bone Khaki on the colour wheel See Ochre Brown on the colour wheel
All matches: Bone Khaki equivalents · Ochre Brown equivalents