I just did the full exam, as the price was the same as for the upgrade exam. That surprised me too.
There are of course questions about generics, enums and autoboxing. The drag&drop questions are new as well. There is also more focus on threading and the API, especially collections and IO. For the rest it was quite similar; declarations, program flow, the basic stuff.
All in all just what is already mentioned in the SCJP FAQ.