When comparing Parabola GNU/Linux-libre vs Trisquel GNU/Linux, the Slant community recommends Parabola GNU/Linux-libre for most people. In the question“What are the best Linux distributions for desktops?” Parabola GNU/Linux-libre is ranked 15th while Trisquel GNU/Linux is ranked 29th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
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 Polished look and feel
Fresh installation looks great.
Pro Reliable and working great out-of-the-box
It works on many machines. Really good.
Pro Good but not so good
There's been a lot of effort put in this project through the years, there is no question about it. It's 100% free and it's very user-friendly, but it being based on Ubuntu 16.04 isn't the best thing, as you are working with software that still is actual but the versions are not the newest.
Cons
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 Same cons that apply to Arch Linux
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 Incompetent developers
They only care about removing "non-free" software, rather than making a properly working OS.
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 Avoid proprietary-only GPU drivers
GPUs without libre drivers are a problem (not fault of Trisquel, of course). Also Wi-Fi cards in the same vein.