ΔE 26.0, loose: different enough that you should pick on purpose. Light Orange is noticeably lighter, much more saturated, cooler than Orange Brown.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 26). Light Orange is noticeably lighter, much more saturated, cooler than Orange Brown.
The same difference applies the other way round: Orange Brown is noticeably darker, much more muted, 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.
See Orange Brown on the colour wheel See Light Orange on the colour wheel
All matches: Orange Brown equivalents · Light Orange equivalents