ΔE 8.7, close: similar, with a visible difference side by side. Bootstrap Brown is a little darker, cooler than Chipping.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Bootstrap Brown is a little darker, cooler than Chipping.
The same difference applies the other way round: Chipping is a little lighter, 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 Chipping on the colour wheel See Bootstrap Brown on the colour wheel
All matches: Chipping equivalents · Bootstrap Brown equivalents