If they are flying between the two city pairs, ALK wins hands down over DL. And it is the employees, from the gate agents to the flight attendants. The pilots at AS even seem more motivated to get off the gate on time.
In the end I think DL is getting too big to manage and to keep consistency in it's product. Also, I think JDP reviewers have to cringe listening to Anderson's fake southern accent...that may be the whole point difference in itself.
million miler DM on Delta, 75k on AS. 74 Captain