What is the difference between a "deluxe" suite and an "executive" suite (besides $25/night?) The website describes the two as practically the same, but I must be missing something.

Have you considered calling the hotel and asking them?

Yes, I have. But the hotel isn't going to tell me "The deluxe rooms are on top of the air conditioning/washing machines/kitchen" and I'd end up posting here anyway.

Has anyone else actually stayed here and can answer the question? Thanks!

The hotel website has a description of each type room, which is virtually identical except for the following:
Executive level rooms have additional amenities to include turn down service each night, a robe, upgraded coffee, and bottled waters. Suites on the front end of the building have superior views of the city.
Looks like the difference is a little pampering.
We stayed in a Deluxe Room last summer and it was perfect for our family of four, and very reasonable for DC at $149 a night. Would definately stay there again.

Thanks, Rich. That's what I needed to know. I can save nearly $200, and not worry about listening to the hum of washing machines all night.