DS studied in State school and got really good grades in his GCSE. DS has got an offer from Grammar school and we are in the confusion state to choose between his current state school which is outstanding ofsted report and a grammar school which is also good and not easy to get in however ofsted report is good. Though we are not really much concern about ofsted report, just wondering about new environment, new teachers/friends, etc. DS is academically good and he prefer to be top in the class. I'm sure if DS going to grammar school, most of them would be really good academically, so either it would push him to do better or in worst case, he may feel down. DS prefer to continue his current school but at the same time he is also thinking about grammar school. DS repeatedly saying that, he would achieve good grades irrespective of schools and he believe that grades depends on students effort, not schools. Apart from academic, both schools are good in sports and extra curricular activities not sure about supporting for uni.
I think this confusion is normal but what are the other things we'll need to consider to choose which one would suit DS best and good for his career?