When comparing Google Chrome vs Chromium, the Slant community recommends Chromium for most people. In the question“What are the best desktop web browsers?” Chromium is ranked 13th while Google Chrome is ranked 23rd. The most important reason people chose Chromium is:
Chromium can access the Chrome Web Store and all the extensions hosted there can be installed and used on Chromium.
Specs
Ranked in these QuestionsQuestion Ranking
Pros

Pro Excellent HTML 5 feature support
Pro Syncs between devices
By logging into Chrome using a Google account it's possible to sync history, extensions, passwords, bookmarks and other settings between devices. This makes it great for anyone working with multiple devices as it allows experiencing consistent context when in the browser.
Pro Plenty of extensions
There are far more available on this browser than any other, and that may matter for some.
Pro Great built-in developer tools
Chrome comes with built-in developer tools, making testing and enhancing web pages simpler for those of us involved in working with such technologies. As well as being beneficial to developers, this also has some benefit to non-technical users; in that by making testing simpler for developers those developers are more likely to use Chrome for their tests, and can spend more time making improvements over investigating underlying causes of issues.
Pro Simple user interface
For example, the address bar is also the search bar. Google calls it Omnibox.
Pro Good performance
According to TopTen Reviews, Chrome is currently one of the best performing browsers for initial (cold) startup, average startup, and navigation times. Works very well with the uBlock Origin adblocker.
Pro Automatically updates
Chrome updates in the background ensuring you're always on the latest version. This makes it much more likely that sites will work on your browser, since (almost) all Chrome users will be running exactly the same version.
Pro Multiple account login
You can have multiple Chromes with different accounts logged at the same time. And it is really easy to manage different accounts.
Pro Sandboxed Tabs
Every tab runs as their own process, so if one crashes or becomes unresponsive, the whole browser isn't affected.
Pro Works great with many extensions
Unlike Firefox, Google Chrome can keep its fast performance regardless of how many extensions are installed. With more than 10 extensions Firefox gets slower and slower in a geometric progression rate. Google Chrome doesn't care how many extensions the user has installed - 3 or 133 it still performs great.
Pro Customizable by user
Each of the managed users can have their own configuration (themes, extensions, ...)
Pro Uses Blink
It uses the blink rendering engine which has removed many legacy khtml/webkit code to be much lighter and faster.
Pro Engine is open-source
Chromium is open source, except the proprietary media codecs like AAC, H.264, MP3 and Adobe Flash, that can't be legally open-sourced.
Pro Can translate text directly
Pro Popular
As of March 2015, Chrome is the most popular browser on the internet, with a 43.9% - 63.7% market share, Its rendering engine Blink is also the most used rendering engine and used in many products including: Opera, Vivaldi, Qt, Brave, Steam or Electron meaning most developers will be testing their sites against this browser to ensure compatibility.
Pro Chrome is faster than Firefox
Pro Backed and supported by Google
Whilst Chrome is based on the open source browser Chromium, Google reviews this code and build on top of it. This means it takes (and contributes to) a number of the benefits of the open source model whilst having the resources, support and investment of a major company.
Pro Plays more media formats than any open source browser
Includes support for many licensed unfree media formats.
Pro Multimedia Plugins and Codecs included
Google Chrome comes with its own flashplayer and the most common multimedia codecs so you don't have to worry that they are outdated nor do you need to install them as a third party package.
Pro Only one distributor
Unlike those various unofficial Chromium builds, there is only one distributor, so all Chrome releases follow the same standards.
Pro Data collection
Chrome uses online services to collect our data and improve our browser experience. But this also means it spys on you.
Pro Access to Chrome's extensions
Chromium can access the Chrome Web Store and all the extensions hosted there can be installed and used on Chromium.

Pro Supports all of Google Chrome features
As Chrome is based on Chromium they overlap in supported features. Chromium syncs between devices, automatically updates, has great built-in developer tools, installs extensions without a restart, includes a combined text bar for entering URLs and searching and has excellent HTML5 compatibility just like Chrome.
Pro Cross-platform
Chrome and Chromium are available on almost every device nowadays
Pro Completely Open Source
Both Chromium and and its rendering engine Blink are licensed under the BSD-license which includes no copyleft unlike the GNU or Mozilla Licenses.
Pro Latest Blink
This is the browser Blink is made for and developed alongside.
Pro Sandboxing
Every tab and plugin runs in its own subprocess so they will never affect the whole browser ,however that consumes more memory than other browsers
Pro Bare
It does not have any extensions preinstalled and focuses to be a web browser.
Pro Does not come with Google
Unlike Chrome it does come wihout any Google account requirement.
Pro Backed by Google
Chromium was first released as a large portion of Chrome's source code as an open source project by Google in september 2008. The idea was to encourage developers to review the underlying code and to contribute in making Chrome cross platform and port it to Mac and Linux as well.
Nowadays Chromium is a large project with a huge community that's standing behind it but still Google continues to take an extremely active role in Chromium development. This ensures the longevity and constant development and improvement of the browser.
Pro Chromium sets the standard for Web Browsing
Since Google Chrome is the most used web browser, and that browser along with many others is based on Chromium, Chromium sets the standards for the internet and for security, and Firefox will always be years behind.
Pro Gets constant updates
While the Chromium-based browser haev to adapt their code to the update before release, original Chromuim doesn't need it so it gets updated more constantly and frequently.
Pro BSD license
You can do almost anything with the code.
Cons
Con Online tracking by default
Chrome allows opting out of tracking by going to Settings > Advanced > Privacy and un-checking any unwanted services. Alternatively Chromium can be used to get a similar browser experience without Google's services on top of it.
Con Huge memory hog
Each tab and extension in the browser uses significant chunks of RAM, giving the browser poor performance on machines without enough RAM to supply.
Con Bad for battery life
Drains battery life on both Windows laptops and Macs much quicker than the alternatives. It can shave hours off the battery life of any non Chromebook laptop.
Con Not fully open-source
While most of Chrome is open source: Chrome does have some closed-source components to make it possible to play some closed media formats.
Con It's Google
Data collection!
Con No mobile extensions
Chrome on Android and iOS does not support extensions.
Con Not as customizable as Firefox or Vivaldi
Con Big target for hackers
Chrome is the most popular browser in the world. That makes it the most targeted browser in the world by hackers.
Con Increasingly slow
When Chrome first came out, it was known for being lightweight and very speedy. Over the years, more and more features have been added to Chrome. Because of this, crashes, errors, and general laggy-ness has increased noticeably.
Con Hard/impossible to transfer passwords to a different machine without uploading them to Google
Con American agents may track you
Con Basic
Unlike Brave and Vivaldi which are more stable and have more features, Chrome is pretty basic.

Con Blurred fonts on Windows
Fonts on Windows are blurred, that is especially noticeable in light fonts on dark background. Small italic text is hard to read.
Con Bad quality control on extensions
Some just plain don't work while a few actually break the browser.
Con Does not hardware accelerate HTML5 video correctly
Chrome is unable to hardware accelerate HTML5 video correctly which makes playing 4k video on laptops a poor experience filled with lag.
Though there is a workaround for YouTube in that a plugin can be installed to force Flash playback instead of HTML5, which plays smoothly and has no HW acceleration issues. There's another plugin (h264ify) that will force to use the h.264 codec video if available instead of the VP9 one which is the resource hog.
Con No menu bar on Windows
There's no menu bar, except on Mac OS or Linux appmenu.
Con No reader view
Unlike most other browsers, Chrome doesn't have a reader view function.
Con Gives too much weight to Google on the future of the Web
Con High RAM usage
Due the sandboxing, Chromium also eats a lot of RAM , which can be a problem for machines with smaller RAM.
Con Lacks privacy options
Con No official builds
There are no official builds available so you have to rely on a third party distributor
Con Can be dangerous / only available as Source
There are plenty of unofficial Chromium distributors and every one of them can disable specific features (like sandboxing) for their build, so you will never know what you get.
Con Not possible to disable WebRTC
Con Fat, slow, and another piece of google spyware
Con Lacks support for certain common media formats
As Chromium avoids bundling any proprietary software, media that requires proprietary codecs or formats such as AAC, H.264, MP3 and Flash will not play by default on Chromium.
Con Can be dangerous
Because it's completely open source, people can make a fake version and install it when you install other software. And people can add a virus in it.
Con Under BSD License
