No way. I'd never try and 'sell' a QF cadetship over a RAAF career and I'd hope that a RAAFie wouldn't try and 'sell' a RAAF career over a QF cadetship- Rex cadetship maybe!
Both choices have pros and cons with long term ramifications that the individual (and their future family) is going to have to live with forever. It is going to be a very difficult choice taking into account each individual's particular circumstances and goals and so there is really no right and wrong choice when viewed from the outside.
Best of luck to anyone faced with that kind of choice. It's an enviable position to be in.
PS: It's no good asking ex-RAAFies whether they'd change their minds if they had their time over again. Each of them has different circumstances that will influence that response and their circumstances are not anyone elses. What was right for them in that circumstance may not be right for someone else in almost identical circumstances.