ΔE 15.0, loose: different enough that you should pick on purpose. English Field Brown is noticeably darker, more saturated, warmer than Dark DAK Sand.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). English Field Brown is noticeably darker, more saturated, warmer than Dark DAK Sand.
The same difference applies the other way round: Dark DAK Sand is noticeably lighter, more muted, cooler.
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 Dark DAK Sand on the colour wheel See English Field Brown on the colour wheel
All matches: Dark DAK Sand equivalents · English Field Brown equivalents