When comparing Chromium OS vs Parrot GNU/Linux, the Slant community recommends Parrot GNU/Linux for most people. In the question“What are the best Linux distributions for desktops?” Parrot GNU/Linux is ranked 37th while Chromium OS is ranked 89th. The most important reason people chose Parrot GNU/Linux is:
It is compatible to Debian >=testing.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Safe and requires little to no maintenant
Since you only have the browser, you cannot install applications (outside Chrome Apps which are decently protected by their limited API and the Chrome Web Store). This means no harmful virus, and also nearly no way you can screw your system. Everything will just work.
Pro Minimalistic interface
Chromium's system UI uses as little screen space as possible by combining apps and standard web pages into a minimal tab strip: While existing operating systems have web tabs and native applications in two separate strips, Chromium OS combines these, giving access to everything from one strip. The tab is the equivalent of a desktop application's title bar; the frame containing the tabs is a simple mechanism for managing sets of those applications and pages.
Pro Lightweight
Because Chromium OS is designed for users who spend most of their computer time on the Web, it is intended for use in computers with little local storage and fast boot-up times.
Pro Compatible with Debian
It is compatible to Debian >=testing.
Pro Testing based
It is always based on the latest testing release so it includes more recent software than a stable based distribution.
Pro Focuses just one desktop
It focus the MATE desktop which makes it unique compared to the more general distros.
Cons
Con Google
Possibly harms your privacy.
Con Made for developers
ChromiumOS is mainly made for development, so there exist no official install images and you have to build it from source or use third party images like Arnold's or the waterfall images.
Con No auto-upgrade (unlike Chrome OS)
Chrome OS auto-upgrade the system, but Chromium OS does not. It's possible that they're thinking about adding that feature from the design doc.