ΔE 22.5, loose: different enough that you should pick on purpose. Imperial Yellow is noticeably lighter, more muted than Orange.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 23). Imperial Yellow is noticeably lighter, more muted than Orange.
The same difference applies the other way round: Orange is noticeably darker, 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 Orange on the colour wheel See Imperial Yellow on the colour wheel
All matches: Orange equivalents · Imperial Yellow equivalents