Arabic Shadow vs US Earth Yellow

How close are they?

ΔE 15.1, loose: different enough that you should pick on purpose. US Earth Yellow is noticeably lighter, more muted, warmer than Arabic Shadow.

Can I use US Earth Yellow instead of Arabic Shadow?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). US Earth Yellow is noticeably lighter, more muted, warmer than Arabic Shadow.

Can I use Arabic Shadow instead of US Earth Yellow?

The same difference applies the other way round: Arabic Shadow is noticeably darker, more saturated, 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.