ΔE 16.8, loose: different enough that you should pick on purpose. Sunset Orange is noticeably lighter, more muted, warmer than Red Orange.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Sunset Orange is noticeably lighter, more muted, warmer than Red Orange.
The same difference applies the other way round: Red Orange 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.
See Red Orange on the colour wheel See Sunset Orange on the colour wheel
All matches: Red Orange equivalents · Sunset Orange equivalents