I would say it’s not very different, just one league above all the others that I’ve come across.
The three things that stand out in my opinion is how much their package manager can query packages, it’s rolling release and the number of packages they have in the AUR.
It makes Arch the most complete and up to date Linux distro,
with the exception of a user friendly forum,
that doesn’t look like the nazi soup kitchen from Seinfeld,
and an installer.