Unless you've got a good deal / the client / work is paying I'd save the extra $ or points and just accept whY both directions. Admittedly I've only got VA to compare from, but for me PE SYD-LAX-SYD just wasn't worth the extra. Whilst the food was presented nicer and there was a little extra legroom, I still couldn't sleep and that's the main issue I'd consider. Save the $ this trip and go for J next time.
When are you travelling? I'll have QF PE to compare against in a weeks time... The general sentiment seems to be that the QF product is better: here's hoping so.