Assuming you mean QF (Qantas)?

I'd go QF. Generally a better experience. AA F is like AA J with an extra course in the meal and a coin flip between excellent and horrid service.

The only upside to AA is that the 77W is a vastly better looking aircraft than the ghastly a380. But since you're inside, it's unlikely to affect you too much On further thinking... the best way to not have your plane spotting ruined by an a380 is to be IN one.