Booked a reward flight AUS-Asia-NRT-SFO in UA F and am considering changing to ANA C (both saver pass). I've done UA F and it's OK but have thought about experiencing the nicer services of an Asian carrier.

Any opinions as to whether NH C in a 77W would be better than UA F on a 744?

Or other asian carriers NRT or HKG to West Coast US or ORD or IAD.

Thanks!