Flightlevel, if you are referring to LHR – HKG, CX also appear to be consistently cheaper than BA on the route. I have booked two flights recently on the route, mix of Economy and Business and both were significantly less with CX. For my dates, Premium Economy was the only class which is more expensive. That does not suggest that they should increase capacity!!
Flying the 350 from Gatwick soon in economy so that should be interesting…..