Marialiusa makes a good point about travel. It was a significant factor in our choice.
I went to NGHS seniors and I loved it. When we moved back to Nottingham, I thought I'd def send DD there - and in fact she did get a place. To send her to Trent almost felt like a betrayal.
But Trent is on our doorstep, and anyone who knows the area and the traffic round here knows that travel to Nottingham is hideous. Also she has the option to stay at school and do her prep until 5 or 5.30pm, creating a definite separation between home and work, and there are never any arguments about homework, or it being left until the last minute.
If she'd gone to NGHS, she'd spend at least two hours a day on a bus, and then when she got home at 5pm-ish would have to start on homework, having left the house at 7.30am.
Once you are in the system you get to hear all sorts of things about the various schools - that Trent is madly sporty (it is very sporty, but there are lots of opps for music, drama, and art is very strong IMO). That NGHS doesn't really support pupils other talents and is an academic hothouse, etc. TBH I don't see many parents now because I don't do the school run any longer, so I don't hear things as much.
But I think you can only make a decision by going to see the school and watching how your child reacts to everything about it, and how she relates to the pupils. And how you feel you can relate to the teachers, etc