Can you elaborate why, say, why UA>BA? I've flown both, and while UA has the slightly better seat (at least compared to old BA J), BA (and I can't believe I'm saying this) has the better food. Granted, UA also has a much better lounge than BA (unless you're flying in BA international F, I guess, which I didn't). I'll be able to check the new BA CW seat a couple of times this year.

I did fly AA and liked it but that was pre-covid, many years ago. Didn't fly Swiss or Delta J.