ΔE 18.5, loose: different enough that you should pick on purpose. Eau de Nil “D.E.G.” is noticeably darker, more saturated, cooler than 'Jack Bone.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Eau de Nil “D.E.G.” is noticeably darker, more saturated, cooler than 'Jack Bone.
The same difference applies the other way round: 'Jack Bone is noticeably 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 'Jack Bone on the colour wheel See Eau de Nil “D.E.G.” on the colour wheel
All matches: 'Jack Bone equivalents · Eau de Nil “D.E.G.” equivalents