When comparing Chromium OS vs Solus, the Slant community recommends Solus for most people. In the question“What are the best Linux distributions for desktops?” Solus is ranked 26th while Chromium OS is ranked 56th.
Ranked in these QuestionsQuestion Ranking
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.
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 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 Rolling release
Pro Easy installation
The installation procedure for this distribution is quite simple. It's GUI based and all you have to do is to follow the instructions given by the installation window itself.
Pro Modern desktop environment
The default desktop environment used by Solus is called Budgie and is quite nice and minimalistic.
Pro Exclusively for desktop systems
Pro Great package management
The software center makes it really easy to install the latest software through Snappy and Flatpak. Including third party software.
The system itself is very stable. All packages in the repository seem to be carefully picked, well prepared and run stable.
System boots quickly and stays responsive. Does what operating system should do, and does it really well.
Pro Seamless Packages
It may not have the most obscure packages, but the packages it does have is a good number of everything a Linux user needs. Gamers, developers, desktop users, etc. all have the necessary packages and then some. The packages themselves are integrated perfectly and are very well updated.
Pro Most stable Rolling Release Distro
Pro Rock-solid Distro
Very stable and well curated.
Pro Rolling Release Model
Wich means you don't have to suffer from version to version updates that can break it.
Pro Well curated software
The software is well curated in the repos, you have access to flatpaks and snaps, so virtually, all the software you'll ever need is there for you.
Pro Lightening fast boot time
Pro Friendly towards proprietary codecs, firmware and drivers.
So you won't have to enable PPAs or extra repos for that.
Pro Built from scratch
Possibly harms your privacy.
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.
Con Not much software
There is not much software available.
Con There is often a black screen after update
Con An upgrade breaks the system quite often
Con Forums are not very friendly
Con No USB Image writer
Con The default desktop environment is not very customizable
Maybe because it's a relatively new project still in its infancy and this may be fixed in the future, but Budgie is not very customizable. You can only change the theme and wallpaper.