ΔE 12.6, fair: the same colour family, but not a straight swap. Scrofulous Brown is much more saturated than Raw Sienna.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Scrofulous Brown is much more saturated than Raw Sienna.
The same difference applies the other way round: Raw Sienna is much more muted.
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 Raw Sienna on the colour wheel See Scrofulous Brown on the colour wheel
All matches: Raw Sienna equivalents · Scrofulous Brown equivalents