They both have their days of good and bad. Right now a lot of trips are not commutable on either end. I think JFK MIGHT have a bit more in the way of commutability, but depending on where you live there may be more commuting options to LGA. In other words, know the various ways to get between the two as a commuter. As for crew lounges, JFK has better facilities. Both can equally go to hell when weather is involved. Anyone else want to chime in also as to how they are different?