ΔE 9.0, close: similar, with a visible difference side by side. Scabbard Brown is a little darker, more saturated than Cuirass Leather.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Scabbard Brown is a little darker, more saturated than Cuirass Leather.
The same difference applies the other way round: Cuirass Leather is a little lighter, 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 Cuirass Leather on the colour wheel See Scabbard Brown on the colour wheel
All matches: Cuirass Leather equivalents · Scabbard Brown equivalents