[Area] Description [Report Designer] Report Designer in Business Intelligence Development Studio is a report authoring environment that is hosted in Microsoft Visual Studio. Use Report Designer project and solution files to organize and maintain a master copy of report definitions, report parts, shared data sources, shared datasets, and resource files such as images and ESRI shapefiles for maps. [Report Builder 3.0] 
Report Builder is a report authoring environment for business users who prefer to work in the Microsoft Office environment. You work with one report at a time. You can modify a published report directly from a report server. You can quickly build a report by adding items from the Report Part Gallery provided by report designers from your organization.