ΔE 8.6, close: similar, with a visible difference side by side. Bronze Brown is a little darker, more saturated than Bootstrap Leather.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Bronze Brown is a little darker, more saturated than Bootstrap Leather.
The same difference applies the other way round: Bootstrap 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 Bootstrap Leather on the colour wheel See Bronze Brown on the colour wheel
All matches: Bootstrap Leather equivalents · Bronze Brown equivalents