ΔE 8.4, close: similar, with a visible difference side by side. Chestnut Brown is a little lighter, more saturated, cooler than Violet.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Chestnut Brown is a little lighter, more saturated, cooler than Violet.
The same difference applies the other way round: Violet is a little darker, more muted, warmer.
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 Violet on the colour wheel See Chestnut Brown on the colour wheel
All matches: Violet equivalents · Chestnut Brown equivalents