ΔE 16.4, loose: different enough that you should pick on purpose. Skrag Brown is noticeably darker, warmer than Warm Orange.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Skrag Brown is noticeably darker, warmer than Warm Orange.
The same difference applies the other way round: Warm Orange is noticeably lighter, 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 Warm Orange on the colour wheel See Skrag Brown on the colour wheel
All matches: Warm Orange equivalents · Skrag Brown equivalents