>>208461. The official and supported installation process is easier and more straight forward, you won't fuck it up.
2. systemd is spyware, void uses runit. Systemd is bloated and too complicated for a PID1
3. arch is generally a distro for beta testers that somehow got super big. They almost don't test the packages they ship so after an update you have a big chance to break something. Void's frequency of updates is lesser and that's a GOOD THING. Still void is a stable rolling release meaning it has a nice balance of stability and freshness of your packages.
4. Void's official repository is bigger than that of arch. arch compensated for that with AUR, but it has massive security issues, you can research them yourself