Orange vs Phoenix Orange

How close are they?

ΔE 27.8, loose: different enough that you should pick on purpose. Phoenix Orange is noticeably darker, much more muted, cooler than Orange.

Can I use Phoenix Orange instead of Orange?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 28). Phoenix Orange is noticeably darker, much more muted, cooler than Orange.

Can I use Orange instead of Phoenix Orange?

The same difference applies the other way round: Orange is noticeably lighter, much more saturated, warmer.

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.