Assuming we are talking SE London here, we'll be starting at the further away Ofsted outstanding secondary vs the our local Ofsted good secondary.
I think it's important to try to make the right decision for your child, and everyone's experiences are different. They will spend a huge amount of time at school so it is important they will be happy there and have the opportunity to become whatever they can.
We looked at it like this:
Our son loves math. Further school offers maths scholorship which is basically an extra hour a week which is meant to be great, and includes some trips. Clsoer school doesn't set or stream for math which we were not keen on and he wasn't either.
Our son also loves sport. This is more developed at the further away school, but the closer school was ok and does have good facilities. Closer school offers specific extra classes for 'sports scholars' which again is meant to be good.
Drama. This was far more developed at further away school and would enable him to drop weekend class he was doing. Only just starting at closer school.
Extra-curricular activities - far more options at further away school.
Languages. Further away school you can study 2 for the first 3 years, and both languages from our family background. One at local school.
Maths and English only 22% Grade 5 or above at closer school, 60% at further away school.
Closer school on upward curve, further away school already where closer school wants to be.
Distance 15 mins walk to closer school, 35-45 minutes to further away school.
Friends - half class going to closer school, none of core friends going to applying to further away school (though we have since found quite a few local kids going from different schools, his football team etc).
We were lucky i nthat we moved our son to a new school at the end of year 5 as he was unhappy as he couldn't study properly in this former school, as well as not liking 'group punishements' 'for other kids behaviour. This gave us an insight into what he wanted, and also make him more comfortable starting at a new school where he doesn't know many people.
So my point it try to work out where your child will be happy, and what that is. It is different for everyone and only you know your child. I desperately wanted to send my child to the nearer school as all the kids at my primary and secondary were from all over London so I loved the close primary experience we had here, but ultimately distance for us can't trump the other bits that for him will work much better at the further school (well we think, you never know of course - it will however be easier to move him back to the closer school if we had to than the other way around, though of course we would hope he stays there).
// we did have another local school that we put 2nd, a boys only school that would have worked for him, but that did much better than the closest school to us I refer to above, which I really like but he wanted co-ed so we left it in the lap of the shool draw.
Good luck and feel to PM if that helps.