New answers tagged content-and-structure
By Default search should bring you results across all Sites (the users has Access to). Or you did somehow scoped the results to current Site
The difference is that the first icon (tree) indicates a Publishing site, the Sharepoint 2013 icon indicates any other type of site (Team, Community, Project etc). You can check the site features of the site that does not have the Sharepoint 2013 icon, under Site Actions --> Manage Site Features --> Sharepoint Server Publishing should be activated.
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