Originally Posted by Canarsie

To me, the explanation is that the premium class cabin experience on domestic Delta Air Lines flights is not substantially better than the economy class cabin experience.

...

However, the premium class cabin experience on international Delta Air Lines flights has a greater differentiation from the economy class experience, including more food choices, pillows and duvets, a higher level of service, and other items that increase in value to help long-haul flights become more tolerable and even enjoyable.