Hello Marco, Dean Nicholls already answered a similar question some minutes ago.

But, just to be sure, your question is answered:

We have compiled the differences for you in a comparison table.

You can either find this comparison chart here on the community portal in the additional download information, or you can access directly the link, that Dean already provided earlier:

Audit, Compliance & Data Intelligence Versions - NetIQ Audit, Compliance and Data Intelligence for Identity Manager 

Basic and Pro operate exactly the same way with the main difference being the number of available dashboards and reports. Also important to note that the Pro version has the Time Machine functionality which gives the status of an object at different points in time which is great for tracking historical changes and non repudiation when unusual events occur. For a full list have a look at www.netiq.com/.../acdi-versions.html