The footrest area doubles as a guest chair. It is intrinsic to the suite design so CX has had it since day 1. Not really a useful feature in my opinion, but it is exactly the same as the "guest seat" that BA boasts of having). As for the BA cabin layout, it is more cramped but the herringbone suite pattern does help quite a bit (while QF has 14 seats using the CX pattern, now that is crowded). Two years ago BA and CX F were close to equivalence, now CX is markedly better in almost every aspect.