This would not even be a question for me, I'd pay up to 30% more for BR's J, which is essentially F-lite. While CX's J is more like lie-flat E+
BR's ++
1. Pyjamas
2. On-board Service
3. Rimowa kits
4. Food
5. Lounge in TPE
All of these BR has CX blown out of the water.
CX's ++
1. Lounge in HKG/BKK
2. OW points if you're OW, but you're UA MM according to your profile?