ΔE 7.6, close: similar, with a visible difference side by side. Cavalry Brown is a little lighter, more saturated than Chestnut Brown.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Cavalry Brown is a little lighter, more saturated than Chestnut Brown.
The same difference applies the other way round: Chestnut Brown is a little darker, 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 Chestnut Brown on the colour wheel See Cavalry Brown on the colour wheel
All matches: Chestnut Brown equivalents · Cavalry Brown equivalents