it looks to me that the new Enterprise has much straighter text on the saucer than the old.
Also, not sure how many decks are in the bridge section of the old, but there seems to be at least 5 decks and an entire wall made up of screens on one part.
The side of the nacelles have an almost flowing ridge like appearence of a Minbari Sharlin Class.
Either way, I can't wait to see the trailer....... and of course the film!!
Xmas 2008 is a Geek year for me, and my lady friend is going to suffer