>>547533
Salix is just Slackware with an APT inspired package manager installed by default. It's useful if you're too lazy to install slapt-get by yourself, or just really like its logo, but I think it gives a poor introduction to Slackware.
>>547536
Not that guy
>Is it the installation process?
Slackware and Salix both use an ncurses installer. Salix also has an optional graphical installer that can run from a live session. The ncurses interface can easily scare off people less technically inclined, and lacks a lot of useful options like encrypted home or FDE by default.
>the repository?
Salix's repo is tiny, it's the same as Slackware's + a few extra things. Slackware expects you to compile most things on your own, or get a build script to compile it for you. You're also expected to resolve your own dependencies in Slackware, while Salix provides a framework for dependency resolution. Most software doesn't actually use that framework, though, so you're often on your own.
>Package manager?
It's like apt, but shittier and less mature, and most of the time doesn't actually do dependency resolution.
>>547577
>there are far fewer packages available than Debian
Because you're usually expected to compile them yourself, unlike the vast majority of distros which expect you to rely on a repo. I would append to this statement, that if you like compiling things yourself but don't want to go for a full-on source based distro such as Gentoo or Source Mage, Slackware may be a good idea.