Hi Any,
Sorry for the delay.
In SSRS 2012, the major enhancement about report authoring is that the Word/Excel rendering extension renders reports to the native format of Microsoft Word/Excel 2007-2010. The format is Office Open XML. The previous version of the Word rendering extension,
compatible with Microsoft Word 2003, is renamed to Word 2003. By default, the Word 2003 and Excel 2003 extensions are hidden, and we can make them visible by modifying the rsreportserver.config file. In addition, there should be some known issues in SSRS 2008
R2 be fixed in SSRS 2012.
Although the operating experience between SSRS 2008 R2 Report Builder and SSRS 2012 Report Builder may be very similar, the newer product always introduces functionality enhancement.
Regards,
Mike Yin
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