In a world full of Chromium-based browsers, it's not easy to stand out. Users need good reasons to not just use Chrome, especially if they aren't too concerned with Google's privacy practices. Either you offer something new and exciting, or your browser won't stand a chance.
Vivaldi brings a few things to the table that are worth your attention. Primarily, an incredible number of customization options — you can change pretty much everything about the browser. Secondly, a robust set of built-in tools and advanced features. And last but not least, a commitment to respect user privacy — pretty much a requirement for any Chrome alternative.