@f33dm3bits -- since Arch is 10 years younger (2002 vs 1992) than Slackware, it would be more proper to say "Arch is similar to Slackware," rather than vice-versa, strictly speaking, of course.
Strictly speaking, the Arch link provided is mostly correct. However, slapt-get was not mentioned (controversial among Slacker purists, I know, but one cannot call
me such!).
Let me provide some information regarding slapt-get
slapt-get does not provide
dependency resolution for packages included within the
Slackware distribution. It does, however, provide a framework for dependency resolution
[3] in
Slackware compatible packages similar in fashion to the hand-tuned method
APT utilizes.
[4] Several package sources and
Slackware based distributions take advantage of this functionality. Hard, soft, and conditional dependencies along with package conflicts and complementary package suggestions can be expressed using the slapt-get framework.
That aside, I will be the first to admit to not being a "Slackware only" user. However, competent usage of the distro is what started me on the GNU/Linux journey. UNIX is what I initially wanted to learn, but politics and economics got in the way at the outset -- there was some Solaris or other legal wrangle going on at the time, prohibiting me from getting my hands on UNIX as an individual. So I went with Linux.
Jaunty Jackalop was my first distro delving into our OS. Looking Slackware over, I decided it was too 'geeky' for me at the time. I quit the 'buntus after Lucid Lynx and moved through so many distros between then and now I cannot remember them all.
I had a Shuttle and bought used hard drives from a local repair shop, putting a distro on each and swapping them out as desired. Also got pretty good at wiping drives using first SysRescCD and then dd command. I loved that Shuttle with an E8400 Core2Duo. Before that I used an ol P4 machine.
Debian became a favorite, especially Sid. Then I discovered Salix -- providing a good bridge for me to continue my journey towards Slackware. Hence, my earlier thread on SalixOS. Salix64 14.2.1 Live is still available. Maybe you'd like to try it and get back on your findings. Just a suggestion.
Enough out of me. Best way to see the similarities and differences is to experience them yourself! Best wishes in that endeavor, f33dm3bits!
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en.wikipedia.org