Delta pay is less, but you work less.
Talked to a DAL senior 747 captain. He is making full pay. He flies about 120 hours per year. Does all his landings in the sim as he basically does not land the plane...gives them away to his FOs. He has one trip to Asia per month, probably works about 8 days/month.
Another guy (much more junior) was on about the equivalent of 1/2 pay in 2012. Was -777 in JFK. He flew less than 50 hours for the year. I think he is FO. Has a BIG side business.