ΔE 18.4, loose: different enough that you should pick on purpose. Ink Skin is noticeably lighter, much more saturated than Burnt Umber INK.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Ink Skin is noticeably lighter, much more saturated than Burnt Umber INK.
The same difference applies the other way round: Burnt Umber INK is noticeably darker, 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 Burnt Umber INK on the colour wheel See Ink Skin on the colour wheel
All matches: Burnt Umber INK equivalents · Ink Skin equivalents