It doesn't matter who tickets the ticket (?!), as long as it's a QF flight number and a QF plane, you can ask for the upgrade. I've a funny feeling it knocks you down the queue a bit if it isn't a QF ticket, but I've no evidence to support that.

Is any of them on the A380? I may pick that flight.

You can also think that flights close the weekends are fuller, so that means QF32 offers you the best chance...