Meanwhile, methinks the OP is interested in the clase basura comparison, which between AS/AA/DL/UA/WN, are substantially similar, except some have a plug for your electrical devices, some have seatback screens and with limited exception (i.e., what you can pay extra for onboard), will have a substantially similar experience. If you bring your own IFE, you'll have an even more substantially similar experience. It is mostly how much the FA barks or doesn't bark at you, how close the lav is and how many there are, and if the airline stocks your favo(u)rite flavo(u)rs of beverages, and how frequently, if ever, you'll receive them.