"So, what's the difference between BackTrack and Kali?" you might be asking. Unfortunately for us, that's not a simple question to answer. It's a mix between "everything" and "not much", depending on how you used BackTrack. From an end users perspective, the most obvious change would be the switch to Debian and an FSH compliant system. What this means is that smaller scripts which used to reside in /pentest are no longer there but present in the system path. However, there's much hidden magic in that last sentence.
It's been 7 years since we released our first version of BackTrack Linux, and the ride so far has been exhilarating. When the dev team started talking about BackTrack 6 (almost a year ago), each of us put on paper a few "wish list goals" that we each wanted implemented in our "next version". It soon became evident to us that with our 4 year old development architecture, we would not be able to achieve all these new goals without a massive restructure, so, we massively restructured.