Since no one has yet commented on which option may be better, can I change the topic to ask for views on the comfort and cost of either United's Economy Plus or else Delta's Comfort Economy for a transPacific flight?

Note: Researching this question I found this comment on Delta's Comfort Economy by the Points Guy: "My biggest issue was the lack of padding on the seat. After 6 hours my bottom half felt numb."

http://thepointsguy.com/2012/02/delt...s-it-worth-it/