(in via Martin)
If you are working with OBIEE and have not signed up for the 
Oracle OBIEE community yet, then you probably have missed the release of the PDF attached to KM Doc:
OBIEE 11.1.1.7 - New Features And Recommendations For Working With Microsoft Office [ID 1558070.1]
It features information such as:
- Integration Features (OBIEE vs MS Office)
- Performance considerations
- Export Limitations
- Machine Configuration Tips and
- report size estimations
Some screenshots in the PDF of reports outline the difference between various export functions (such as):
All in all, it will allow you to understand your OBIEE better. It guides you to integrate your OBIEE with SmartView and Office in ways that you might not have thought of, and alone for that I would consider this a must read for any (new) OBIEE user out there.
(unfortunately we can not attach the PDF to this blogpost for legal reasons - you need to go to MOS to actually look at the KM doc and the PDF)