ΔE 19.2, loose: different enough that you should pick on purpose. Sunset Orange is noticeably lighter, warmer than Scarlett Red.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Sunset Orange is noticeably lighter, warmer than Scarlett Red.
The same difference applies the other way round: Scarlett Red is noticeably darker, 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 Scarlett Red on the colour wheel See Sunset Orange on the colour wheel
All matches: Scarlett Red equivalents · Sunset Orange equivalents