A few observations based on my own recent AONE4-based RTW trip ...

CX seats are aligned with the sides of the aircraft, while BA's are angled. I found that the angled placement made BA's seat slightly more private in terms of visibility of other passengers.

On the other hand, a consequence of BA's angled layout is that your seat is
adjacent to the person behind's visitor's seat. If you are in 2A and 3A has a visitor, that person is very close indeed, albeit through a thin partition, and their every move is transmitted to your seat. CX seats, at least at the windows, are physically separated by what look like half-height bulkheads so whatever the neighbours get up to (so to speak) you won't feel it!

While I found the BA food and wines to be very good, I thought that the CX food and drink service was consistently superb ... just a whole new order of excellence. This applies to quality, quantity and presentation.

CX has a truly state-of-the-art IFE system, with an extensive library of audio and video entertainment available on demand via on-screen menus. No fiddling with tapes for movies or making do with radio-type presentations for music. And, of course, they supply good quality headphones. I would have preferred the screen to be closer, however.

Although I remain a staunch BA enthusiast, I would have to say in all honesty that, based on my recent experiences, I think CX has the stronger F product.