Depends what your priorities are. As PDXPremier mentions mileage opportunities are better on AS, although not clear if you’ll be flying enough where that will really make a difference. Seat comfort is at worst a wash, but may have a slight edge to AS. I’m 6’5” and can tolerate Premium on AS whereas Comfort + on DL (or sometimes even First) can feel tight, especially if the person in front reclines. Crew is always a wildcard but in my experience AS are almost always friendly and helpful whereas on DL they are sometimes indifferent and going through the motions, but I have also had great experiences on DL. If you want to booze it up AS will have two runs of the drink cart and will also provide refills on request, have seen some comments lately about DL cutting back in C+. Can pre-order food on AS, don’t believe DL has that option. Depending on future travel plans DL of course has a much larger network so if you plan on much travel on the East Coast DL may be a better bet.