I heard that with SPS (SharePoint Portal Server) can use existing data effectively and capture information the way it makes sense to our business and the search and index facilities help access data easily.

And I know that OLAP is a great tool for Collecting data from several heterogeneous sources, help planning and decision-making, Aggregate and summarize data, Can deliver data to business users faster, ...etc

To make use of our existing data (SQL) effectively, which product you think I should promote?

Is there any comparison article between the two products?