Seat: IB seat is better, but AA's pitch is unmatched. Seat selection on AA is better.

IFE: IB is better, but AA's combo of DVD player + Bose suits me just fine.

Food: Even though I enjoy IB Spanish choices I find AA food better and more filling.

Service: IB is good, but often in a sense that's not appreciated by non Spanish pax. AA is also good, but often in a sense not appreciated by non US pax. Flip a coin, as both are quite capable of making you feel either great or miserable.

Reliability: IB is often late, but AA is more prone to mechanicals.

My overall preference: AA.

OT: Merry Xmas to all