*UPDATE* This was recorded in October 2015 and a lot has changed for Groups since. eDiscovery support along with many changes.
There's a lot of confusion these days around Office 365 Groups vs SharePoint Team Sites and which you should use and when. The thing is, they aren't something to compete with one another as Groups isn't really a product, it USES a SharePoint Team Site. Therefore, they are really one and the same when it comes to collaboration on files. The difference is that Groups also ties in the rest of the Office suite to enhance your user's experience.
Find out more on Groups for Office 365: What are Groups for Office 365 and how do they work
This includes a webinar recording as well
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