Dear flyers, thank you for reading this thread!

I am planning an ex-JNB or ex-AMM DONE4 RTW this year
My major itinerary would be
JNB or AMM-LHR-(MAD)-LIM-SCL-JFK-HKG-DXB
or - SYD -JNB or AMM

My question is that which airline provide better J cabin experience, especially for long flight.
For example:
IB, BA, LA provide flights connecting europe and south America,
which provide best J cabin experience? or best lounge?

JL, CX, AA all provide cross pacific flight from NA to Asia, which provide better J cabin?

LA and QF provide SCL-SYD
LA is operating with A340
QF is operating with 744
Which provide better J ?

Besides, for IB and BA, which is better in service, flight accuracy or even lounge ?

Thank you again who read this thread!