When comparing Parabola GNU/Linux-libre vs FydeOS, the Slant community recommends Parabola GNU/Linux-libre for most people. In the question“What are the best Linux distros that don't use systemd?” Parabola GNU/Linux-libre is ranked 6th while FydeOS is ranked 44th.
Ranked in these QuestionsQuestion Ranking
Pro Protects your freedom, certified free by the FSF
Pro Option to use OpenRC or Systemd
Parabola has an OpenRC edition and a Systemd edition, so users can choose which init system they want.
Pro All the benefits of Arch Linux, only 100% certified free software
Pro Very Secure
Pro Has its own repos
Parabola has its own repos (which are almost as large as Arch Linux) and the IceCat browser is included.
Pro Can be migrated from Arch Linux without a CD/USB
Pro Based on Arch Linux
Pro On par with Chrome OS
Features are almost on par with Chrome OS
Con Not compatible with AUR
Unlike other Arch-based distros, this free distro doesn't support AUR.
Con Small repositories
Since Parabola is a completely free distro, there is no non-free software available and the community repositories are small compared to the AUR.
Con Won't work out-of-the-box on the most PC's
Almost all PCs need non-free drivers but Parabola has none to offer.
Con Incompetent developers
They only care about removing "non-free" software, rather than making a properly working OS.
Con Same cons that apply to Arch Linux
Con Serves no purpose
It's just Arch without non-free software and is basically a niche OS with few users.
Con Not really free
People have to pay hundreds to maintain this distro.
Con Chinese Software
You never know... ...they also replaced the Google cloud with their own(but you can also revert this back (https://forum.xda-developers.com/hardware-hacking/chromebooks/fydeos-google-sync-using-fydeos-account-t3872442).
Con No dualboot
It does not support dualboot on the same harddisk as the OS.