I fly from JFK to HKG every 4-6 weeks. I used to go on CX coach (through YVR) but ever since the price of tix on AA flights has gone down, I have never looked back.
Much more comfortable in AA. I always take the JFK to NRT and transfering to CX to HKG.
It feels so claustrophobic in Y on CX. As soon as the person in front of you reclines, his seat is about 8 inches away from my face.
The food, service and FA are much better than AA though. My priority is the comfort.
Lately, CX is MUCH more filled with pass. over AA - so that also plays into the comfort ratio.