Kali Linux is based upon Debian Linux, instead of Ubuntu and new streamlined repositories synchronize with the Debian repositories 4 times a day, constantly providing users with the latest package updates and security fixes available.
Another great feature introduced is that, because of Debian compliant system, it is now able to Bootstrap a Kali Installation/ISO directly from Kali repositories. This allow any user to easily build their own customization of Kali, as well as perform enterprise network installs from a local or remote repository.
The Kali Linux ARM Architecture images work like charm on Samsung ARM Chromebook, Raspberry Pi, ODROID U2 / X2 and SainSmart SS808.
With more than 300 penetration testing tools, completely free, Open source, Vast wireless device support, GPG signed packages and repos, Multi-language, Completely customizable make this distribution one of the best available masterpiece of hacking community.