QF premium yes, better seat, pre takeoff drink, pe kitchen. Far better on paper.
I found the return from SIN to LHR to be a hassle though, too many Aussies, and they're all on Sydney time. I did the trip 3 times in PE on QF with the JSA, each time was woken 3-5 hours before arrival by yabbeting Aussies who were up walking and talking at 3am. Very annoying.
Got op-upped on return in January, far better, and I found business qf on the a380 to be better than CW. Roomier seat, no problem getting into the aisle (although I had an exit row seat)