ΔE 17.1, loose: different enough that you should pick on purpose. Desert Tan is noticeably darker, warmer than Twin Suns Yellow.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Desert Tan is noticeably darker, warmer than Twin Suns Yellow.
The same difference applies the other way round: Twin Suns Yellow is noticeably lighter, 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 Twin Suns Yellow on the colour wheel See Desert Tan on the colour wheel
All matches: Twin Suns Yellow equivalents · Desert Tan equivalents