We are looking at two different databases, one is relational and the other is not. What is the differences? Are their advantages for a relational database?

Here is the basic definition of Relational Database: http://www.webopedia.com/TERM/R/RDBMS.html

It's been my experience that if the features of the applications you are looking at are the same that you're probably better going off with RDBMS than some crazed homegrown DB or flat file system. For the simple availablity of tools to manipulate, view, or copy the data.

My $.02.

John