The lunch and dinner prices are the same. However, there are some extra things at dinner (steak, crab) that you can't get at lunch. Also, the Monte Cristo sandwich (about $18) is only available at lunch. Yes, the prices are expensive, but you're also paying for atmosphere, and it's well worth it.
Source:
http://allears.net/dlr/din/menu/menus.htm
Click the menu of your choice.