Hi Ema
I'm not sure I can be as helpful as Akasully2, with so much relevant experience of the schools you're considering, however...
My 2 boys have attended several schools here and in the U.K., private and state in both countries. I have to agree with Arwen's comment, because one of my boys just doesn't seem to be cut out for private school. He was bullied both here and in England in private. We have just moved him from an Anglican School to a state primary and he absolutely loves it.
On the flip side, my other son had a terrific experience at the Anglican school, with the most wonderful teacher you can imagine. His time in state school in England was dire. So bad that I removed him from school entirely, which I know is extreme, but that's how bad it was! However, he is also really thriving his new state primary here.
I guess what I'm saying is that the right school for your particular child may be private, or maybe not. Given our son's negative experiences at private school, we decided to move into Churchlands Senior High catchment, as it's a state school that enjoys a good reputation. As I say, that's just the solution our family has arrived at. Lots of our friends have kids who are very happy in private, or plan to send their kids private for high school.
The best of luck with your decision.