I do not object to the double posting in a situation like this, and think you handled it well.
The consensus on the other thread is that, to the extent AA has any advantages over CX (and many reject that proposition outright), it's only if you compare AA's J service on its 763s to CX's J service. And since there's no route on which AA operates 763s in competition with CX, the point is somewhat moot. I will also add that, in F, there is no comparison: CX wins hands down.