I’m a IBM Certified Cognos developer who is just learning Business Objects.  With many years of Cognos experience and just a few weeks with BO  I must be clearly biased towards Cognos and I probably am.  So with my bias why even write something comparing the two technologies?  Why not?  As a consultant I am always learning new technologies and being asked to compare and contrast them. Given the number of different tools offered by both vendors, I think the comparison is best done at the individual tool level.  It is also important to note that I have not used all the tools Business Objects has to offer.

Web Intelligence vs. Report Studio/Query Studio