Edwin, you are comparing two products with different installation structures and very different strengths.
Info Explorer is a good tool at a reasonable price per user but it is an OLAP tool delivering reports in a custom interface and does not cater well for financial reporting.
The SAI OLAP comparison is centralized per site and delivers reports OLAP and other through 1) Report Manager or 2) Report viewr licenses.
Thats the best short answer I can muster - hope it helps