The Difference Between the Paid and Free Versions of QReate & Track

To answer your question, this video might help:
http://qreateandtrack.com/2010/03/04/video-benefits-of-registering-...

It walks through the features available to registered users of QReate & Track. It touches on the ability to upload lists and generate codes for Personalized URLS (which provides a unique tracking URL, so you know who scanned before hitting the page).. It also walks through some of the key reports.

Also, this page provides screenshots of the main reports:
http://qreateandtrack.com/features/measure-qr-code-success/