Moving To Bangkok And Need Feedback On Schools

Good day to everybody. My family will be moving to Bangkok in May and we are looking for schools for our 2 children, a boy 6 yrs old and a girl 4 yrs old. We have applied in ISB and Patana. I have received feedback form my co-workers who have had the opportunity to study there and they said that ISB has high incidence of bullying but they were there about 15 yrs ago. So does it still happen? I'm just concerned that being Asians, my children will be smaller than Caucasians. We have been able to see ISB and we loved the place. We have not yet seen Patana. Who has the better curriculum? Your feedback will be greatly appreciated because a lot of our decisions will be based on where they will go to school.