Boy am I glad I went for my N6. The 810 is jacked up!
Data for the apps. I know, there's supposedly an API for devs to upload app data for a restore. But whatever it is, and as for as many apps as I've tried, I haven't seen that even ONCE. I hate going to a new phone or ROMing a phone and having to set all my settings for my apps all over again. Or redo games. This stuff should be automatic.
Whenever I restore a backup from iCloud on my iPhone I have to set up apps from the start all the time.
iTunes local restore is different.
As backwards as it is, I wish Google would have a local backup option in addition to the cloud. That way, storing potentially sensitive information isn't as "risky". I can only assume that's the reason iTunes/iCloud backups are different.