Join Date: Jan 2005
Location: New York, NY
Programs: UA, AA, DL, Hertz, Avis, National, Hyatt, Hilton, SPG, Marriott
Posts: 10,042
I don't think there's any doubt that Delta's D1 suite (with door) is a higher evolution of J hard product than United's Polaris.
The tradeoff is fewer seats in comparable cabins and a smaller fleet of so-equipped airplanes (at ultimate fit-out).