Depends which cabin you are in.If Y take the direct service.if J or F I would fly AA.I dont like the BA J set up as we travel as a couple.Plus I have found the AA service to be more consistent than BAs.Have had some great service on AA to or from Europe.
I would usually pick BA over AA, but if you could get one of those new AA 777-300s they look pretty swish...
Keep in mind that there is no status bonus flying BA, which could tip the balance for some. I've always used BA trans-Atlantic but would try AA next time. They are an improved airline.
AFF Supporters can remove this and all advertisements
Sorry - ignorant on these issues. What do you mean? AA is better than BA for SC earn? Usually fly CX or QF in OW.