ΔE 11.1, fair: the same colour family, but not a straight swap. Khaki Drill is more muted than Raw Sienna. They are different kinds of paint: Golden Raw Sienna is an ink, glaze or transparent paint and Vallejo Khaki Drill is a one-coat contrast-style paint, so they won’t behave the same on the model even where the colour is close.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Khaki Drill is more muted than Raw Sienna. They are different kinds of paint.
The same difference applies the other way round: Raw Sienna is more saturated.
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 Khaki Drill on the colour wheel
All matches: Raw Sienna equivalents · Khaki Drill equivalents