https://wiki.archlinux.org/title/Arch_Linux

and here:

https://wiki.archlinux.org/title/arch_compared_to_other_distributions#Debian

but if I had to summarize it:

* pacman is much better than apt

* AUR is much better than 3rd party ppa repos and almost everything is in there

* most up to date software

* archwiki is the best and most complete linux resource on the entire Web