DL A320/A319 Seat Width
I have flown a few legs recently on an A320 and A319 and it seemed the seat was not as "comfortable" as the seats on Frontiers and United's seats. I checked seat guru and Delta's width is 17.0 and 17.2 inches while the other airlines list 18.0 inches.
Did DL just put the same seats in as the 757 and 738 aircraft and if so why would they waste the wider Airbus cabin?
The aisle armrests were also fixed but aren't on most of the other airlines when I fly them. Any idea why Delta goes with a less comfortable seat?