ΔE 17.7, loose: different enough that you should pick on purpose. Orange Brown is noticeably lighter, more muted than English Field Brown.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Orange Brown is noticeably lighter, more muted than English Field Brown.
The same difference applies the other way round: English Field Brown is noticeably darker, more saturated.
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 English Field Brown on the colour wheel See Orange Brown on the colour wheel
All matches: English Field Brown equivalents · Orange Brown equivalents