Teams, includes all items from a group. And adds the following features...
Each team is viewable in teams app, channel creation, public channels for all team member access, or private channels for restricted access. Integration directly with the SharePoint for simple and easy access to conversations, files, wikis, notebooks etc. Increase productivity by not having to use browser to login to SharePoint as a separate task from your Teams application.
Groups and Teams can have their external file sharing disabled for compliance reasons. Default share links can also be modified to only allow members with existing access instead of anyone with link.