ΔE 19.8, loose: different enough that you should pick on purpose. Endurance Brown is noticeably darker, much more muted than Ruddy Fur.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 20). Endurance Brown is noticeably darker, much more muted than Ruddy Fur.
The same difference applies the other way round: Ruddy Fur is noticeably lighter, much 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 Ruddy Fur on the colour wheel See Endurance Brown on the colour wheel
All matches: Ruddy Fur equivalents · Endurance Brown equivalents