Having friends at both NAA and VARA, I can tell you the VARA eba is about 15 years ahead of Network. Starting pay similar but all the trimmings far better at VARA. If you have the luxury of being accepted by either, you will be flying an F100 for a long time as when network get A320 there will be 100 pilots ahead of you to fly it. Of course Network have no Seniority list so you may be able to schmooze up to the right people and get a 320 Effo slot early. As far as being part of Qantas, don't kid yourself, yes it's a wholly owned subsidiary but my understanding is that to get into QF mainline is the same long path as someone off the street, at least VARA gives you a group DOJ and you'll only have 1500 odd ahead of you😉
As for the comment above regarding a/c less than 50t not being worth much if you want to move on, that's true if you wish to move out of the sheltered workshop called Australian aviation, but wether you join Network or VARA, you'll be flying something under 50t (at least initially)