Thank you for your message.
In order to have a look at the difference between version 9 and 10 of the Powercenter Developer we highly recommend you do the free of charge training:
PowerCenter 10: New Features - onDemand eLearning which you can find here: https://www.informatica.com/services-and-training/informatica-university/find-training/powercenter-10-new-features/ondemand.html#fbid=IA9denkEeIF .
We highly recommend you prepare yourself well and use the following additional resources:
- View the certification program at http://www.informatica.com/us/services-and-training/certification/
- There is a program Q&A video on YouTube that may be helpful. You can check it out at http://www.youtube.com/watch?v=f_daRcGfLgw