I kept a minor difference that wasn't listed in the README, nor in AirBnB's style guide. It allows assignment in expressions, but only if wrapped in an extra set of parens to signify the intention.
Node 0.10 and 0.12 support dropped. eslint 3.0, which is a dependency of eslint-config-airbnb-base, requires Node 4+.
Differences are laid out in the README.