When comparing Kali Linux vs Devuan GNU+Linux, the Slant community recommends Kali Linux for most people. In the question“What are the best Linux distributions for desktops?” Kali Linux is ranked 38th while Devuan GNU+Linux is ranked 45th.
Ranked in these QuestionsQuestion Ranking
Pro Standard pentest tool set
Pro Better than ParrotOS, BackBox for hacking purpose
Contains too many tools for hacking. Those tools are not already included in BackBox or ParrotOS.
Pro Live session distro used for forensics
Pro It's debian
Devuan is debian just without systemd, it just mirrors the the debian archive and repacks packages that have hard deps on systemd
Pro Init based
Isn't based on systemd which can spread malware into your system.
Pro Most decent look amongst other XFCE distros
Default XFCE theme is unique of all the XFCE distos including MXLinux, Xubuntu etc.
Con Not intended to be a daily driver
This distro was written for pen testing and security work. It is not meant to be a day-to-day OS (unless that's your job).
Con Very old packages
E.G. Firefox's current version is 61 but Kali linux consists of its 52th version. Though kernel is not that old.
Con Impossibe to install on non-free hardware
Unlike Debian, Devuan offers no unfree install media so if your system needs unfree drivers(eg a laptop or a tablet) its nearly impossible to install devuan on it.