The much awaited Apple event is tomorrow (http://www.gsmarena.com/apple_sends_invitations_for_an_iphone_event_on_september_10-news-6716.php), so it's time for final leaks. Chinese site CTech has dug up the specs of the iPhone 5S, the higher end of the two models expected to be announced tomorrow, and compared it to previous iPhones.
Now, we can't read Chinese (and since it's in an image, Google Translate isn't very helpful) but the gist is pretty clear