When comparing Slax vs Endless OS - Educational Edition, the Slant community recommends Slax for most people. In the question“What are the best Linux distributions for desktops?” Slax is ranked 54th while Endless OS - Educational Edition is ranked 91st. The most important reason people chose Slax is:
Changes you make in the configuration persist if you run from USB.
Specs
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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 Coding Games for Adults or Kids
Some games require you to think quickly so you will build up valuable skills for your workplace.
Pro Offline or Online Use
Don't have an internet connection? That's fine, the OS works just fine without it, but you will need one to keep the system up to date.
Pro Great OS for a public Library or in a classroom as an alternativeto traditional
For countries that struggle with educational budgets, this is an all-in-one OS for you in every classroom
Pro Stay Focused with Games or training
Too much work makes us dull, sometimes we want to play a coding game. Train our minds, learn something new, and program the next great app.
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.
