Snacks all day, including in coach. Complimentary access to a business center.
Between BOS/DCA and LGA, service is all on Airbuses/E175's so no real difference to Airbuses/E190's unless one is elitest enough to dismiss express as beneath them - DL's E175's have FC. There are the CRJ's between DCA and BOS - presumably to better fit capacity with demand - but a number of those flights are 700's with FC.
Jim