When comparing SliTaz vs Devuan GNU+Linux, the Slant community recommends SliTaz for most people. In the question“What are the best Linux distributions for desktops?” SliTaz is ranked 15th while Devuan GNU+Linux is ranked 60th.
Ranked in these QuestionsQuestion Ranking
Pro Very fast
Pro Can add desktop effects
SliTaz has a feature called "Desktop Effects" which can add shadow or fade effects to windows.
Pro Very customizable
SliTaz is very customizable. You can programatically edit and change anything you want on how the OS looks or behaves.
Pro One of the smallest distributions with desktop GUI
The core liveCD is only 35 megabytes. The boot-from-internet option fits on a floppy.
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 Install instructions are in French
When first booting SliTaz from a USB or from a Live CD, the installation instructions are in French.
Con Not much variety as to available applications
SliTaz does not have as many applications in its repositories as the bigger distros such as Ubuntu.
Con No systemd
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.