Plus there's some small lighting detail changes (extra lights on top of the nacelle 'hoods' etc) and possibly a change in the design of the phaser turrets.
The "official" size is plain and utter BS. We all knew that. That image just confirms what we always suspected;
The nuEnterprise saucer is virtually the same size as the TMP Enterprise. The image confirms that the saucer "edge" has 2 decks, just like the TMP version.
You're suggesting that the people that made the CG model (stated to be built at 1:1 scale in the 3d environment) are
wrong and don't know how big their own model is?
If so, explain the cavernous shuttle bay + engineering sections, tall multi deck atrium area under the top dome and the bridge + view screen. They, and their visible external detail, simply don't fit the TMP size. Official size is official.
There's a thread at Trek BBS which discusses this with boat loads of visual evidence (including said corridor shot) much better than I can be bothered to do.
Most likely, from my view as a compositor, the lens distortion applied to the shot is playing a part in the perceived discrepancy; towards the back of the damaged area it clearly seems that like there could be four of those decks fitted into the saucer thickness. Or three with plenty more space between them.
Or this is simply another case of the vfx team 'cheating' the details a little bit so that the audience can clearly and quickly recognise what the director wants them to see, in this case the power going out and emergency lighting coming on.
Disappointed at the bonus feature situation, however shafting the customer seems to be the way most things are going, especially in dvd and games. I'm happily paying to be able to watch the film again, but there's no way I'm buying the same thing multiple times to get all the bonus stuff. I'll stick with the steel book from play.com.