ΔE 20.5, loose: different enough that you should pick on purpose. Transparent Brown Iron Oxide is noticeably darker, much more saturated, warmer than Tallarn Sand.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 20). Transparent Brown Iron Oxide is noticeably darker, much more saturated, warmer than Tallarn Sand.
The same difference applies the other way round: Tallarn Sand is noticeably lighter, much 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 Tallarn Sand on the colour wheel See Transparent Brown Iron Oxide on the colour wheel
All matches: Tallarn Sand equivalents · Transparent Brown Iron Oxide equivalents