ΔE 6.8, close: similar, with a visible difference side by side. Leather Brown is a little lighter, more muted than Scabbard Brown.
✓ Two Thin Coats comparison chart lists these two as equivalents.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Leather Brown is a little lighter, more muted than Scabbard Brown.
The same difference applies the other way round: Scabbard Brown is a little darker, 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 Scabbard Brown on the colour wheel See Leather Brown on the colour wheel
All matches: Scabbard Brown equivalents · Leather Brown equivalents