The differences I have noted (from photos) include:
* revised grille and front bumper, with the bumper having the lower twin gills found on the 03-05 coupes and the grille more smoothly integrated into the bumper
* totally restyled rear taillight treatment, a la TL and the coupes
* chrome-plated Honda "letter" badge in steering wheel hub, rather than full badge with black-background
* aluminum surround piece on radio/climate control unit
* a revised font to the numbers on the speedometer
Fellow newsgroup posters are welcome to add to this list, since I may have overlooked some revisions or enhancements.