Those carriers deploying a PE product (AA and DL) can target their J project at the revenue market and have PE for upgrades. With no PE product at UA, their J product is their upgrade product, so they need a big dense cabin if they want to market upgrades.
Originally Posted by
spin88
I am sorry, but the UA seat is subpar in every way. Both are 6'6" but - if what others are saying is true - the DL seat will be wider, and it looks like the Vantage XL foot box is not tapered, while that of the Polaris clearly is. So the effective lenght will be shorter for tall people with large feet.'
If the Vantage XL foot box isn't tapered, it must be narrow from the start, since the side table it's under isn't that wide.