I personally liked the Onkyo sound settings better than the Denon. They do have a bit of a different sound to them.
But the ability to have all 11.2 speakers going with the Denon is nice. The Denon also has the ability to store your Audyssey settings...when the save feature works.
You can really crank the Denon up a bit more given the higher power though too. Not that I need to go that high though.