ΔE 54.8, loose: different enough that you should pick on purpose. Smoke Ink is noticeably darker, much more muted than Transparent Brown Iron Oxide.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 55). Smoke Ink is noticeably darker, much more muted than Transparent Brown Iron Oxide.
The same difference applies the other way round: Transparent Brown Iron Oxide 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 Transparent Brown Iron Oxide on the colour wheel See Smoke Ink on the colour wheel
All matches: Transparent Brown Iron Oxide equivalents · Smoke Ink equivalents