ΔE 10.0, close: similar, with a visible difference side by side. Vulcan Orange is a little lighter than Skrag Brown.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). Vulcan Orange is a little lighter than Skrag Brown.
The same difference applies the other way round: Skrag Brown is a little darker.
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 Skrag Brown on the colour wheel See Vulcan Orange on the colour wheel
All matches: Skrag Brown equivalents · Vulcan Orange equivalents