For people looking for evidence that MS people were bragging about their graphics advantage check this thread:
http://gamrconnect.vgchartz.com/thread.php?id=51237&page=1
I have no idea if there is actually evidence in this thread But enjoy finding it out.
I myself dont care much about the graphics difference on X1 or PS4, I still have not bought either one of them, and the games is what matters and if they are playable.
PSN ID: clemens-nl