ΔE 18.0, loose: different enough that you should pick on purpose. Light Orange is a little lighter, more muted, warmer than Scarlet.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Light Orange is a little lighter, more muted, warmer than Scarlet.
The same difference applies the other way round: Scarlet is a little 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 Scarlet on the colour wheel See Light Orange on the colour wheel
All matches: Scarlet equivalents · Light Orange equivalents