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