ΔE 10.5, fair: the same colour family, but not a straight swap. Raw Sienna is more muted, warmer than Light Tone. They are different kinds of paint: Army Painter Light Tone is a wash/shade and Golden Raw Sienna is an ink, glaze or transparent 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). Raw Sienna is more muted, warmer than Light Tone. They are different kinds of paint.
The same difference applies the other way round: Light Tone is more saturated, 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 Light Tone on the colour wheel See Raw Sienna on the colour wheel
All matches: Light Tone equivalents · Raw Sienna equivalents