It can take a little time to wrap your head around, but Gmail labels wins on features and functionality, hands down. In typical Google style, Gmail’s launch changed the face of email on account of its innovative labels and categories system. Emails can only be assigned to one folder, which limits how effectively you can organize your messages. One of the downsides, though, is that Outlook’s folder and file system can feel restrictive. Outlook has a traditional folder and file system, much like most other email service providers. Outlook: Features Outlook’s Folder and File System Let’s take a quick tour through the timeline.
There’s quite a lot of history behind the battle for dominance between Gmail and Outlook.