ΔE 6.1, close: similar, with a visible difference side by side. Saddle Brown is a little lighter, cooler than Wood.
Usually, if you are not matching paint already on the model. Close match (ΔE 6). Saddle Brown is a little lighter, cooler than Wood.
The same difference applies the other way round: Wood is a little darker, 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 Wood on the colour wheel See Saddle Brown on the colour wheel
All matches: Wood equivalents · Saddle Brown equivalents