Chromium is an open source version of Google's popular Chrome browser. Initially released alongside the first version of Chrome, the open source version is now maintained and updated by fans and users, creating additional add-ons and content.
Freedom to choose
The biggest difference between Chrome and Chromium is the lack of official Google support. For the standard user this means that it has less features and playback options. Some popular video files cannot be played natively, expansions are blocked and updates are not handled automatically. The trade-off for fans of open source software is a greater degree of adaptability, meaning the browser can be adapted to fit a particular use or security concern. For the vast majority, however, this simply makes it a less useful choice. Chromium operates in a very similar manner to Chrome, including down to the standard interface. While Linux users may prefer the ability to customize and choose to extreme detail, it is certainly a niche choice.
Only for some
With such minimal advantages and large disadvantages for most, it can be hard to recommend Chromium. Users of custom software will enjoy the wide community and large amounts of custom add-ons but beyond this particular group, Chrome just functions better.