When comparing Slax vs ArcoLinux, the Slant community recommends ArcoLinux for most people. In the question“What are the best Linux distributions for misanthropes?” ArcoLinux is ranked 15th while Slax is ranked 62nd. The most important reason people chose ArcoLinux is:
Unbelievably fast for ArcoLinux with XFCE, Openbox, I3.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Persistent changes
Changes you make in the configuration persist if you run from USB.
Pro Pretty fast to boot up
It was considerably fast to turn on when booting from cd.

Pro Modules
Standard tar archives plus some simple shell scripting produces modules that you can load dynamically into the OS for added apps and functionality.
Pro Modern desktop

Pro Small footprint
About 200mb, but with a full KDE4 environment and loads of useful apps.
Pro Easy to install
Unbelievably fast for ArcoLinux with XFCE, Openbox, I3.
Pro Community support is great
Need to install Discord on cell phone and computer. Fastest way to receive help. Community is mostly European on Discord so getting help at midnight may be a challenge.
Pro Helps you to become a Arch Linux user
Pro Blazingly fast!
Startup time, shutdown time, everything in between.
Pro Easy to isntall desktop environments
Thanks to the manuals provided by the developers it is really easy to install more than 10 different desktop environments that'll work at the same time!
Pro Easy to install, handles system memory well, and a great way to learn Arch Linux
Incredibly fast, easy to install, tons of software pre-installed and easily installs more.
Pro XFCE, Openbox and I3
Finished Product with almost every tool a experienced user will use.
Pro Easy to install NVIDIA Drivers
Has option to install NVIDIA proprietary drivers. Runs great.
Pro Learning bash script
The fastest way to reload any Linux desktop is a script that will install all your favorite apps. Keep this file on a USB stick Update for any distro from Ubuntu, Fedora, or even Arch Linux back to your favorite apps in minutes.
Pro Efficient use of Memory, Easy to Install, Amazingly Fast
OpenBox on Arco Linux is AWESOME!
Cons
Con Overly complicated HDD/SSD installation
While it has a nice layout Slax's lack of an installer tool like Tinycore's just can't be justified. It seems strange that it comes built in with programs that some users may not want, yet it doesn't have an easy way to install it. Due to its heavier use of RAM, built in software, and lack of an installer its hard to choose it over TC.
Con Works slowly on old computers
Con Infrequent releases
Since Slax is maintained by only one person, releases are not that frequent. So it may take a while to get bug fixes or new features once you start using it.
Con Small development team
Con Multiple types makes new user confused
Due to multiple types, new user might get confused and leave this all along.
Con A bit bloated
It is a bit bloated to many web browsers, text editors out the box. A simple customize menu's for all 3 desktops would have been nice.
Con No single ISO
Con Forums are not very friendly or helpful
