KTS also accepted my son and I also read their principal's monthly newsletters. Her thinking is closer to mine and thus I really love this school.
I believe Good Hope is also a good school and their secondary school backup is also the advantage.
You may try to compare other factors like location, school fees, support to kids and parents for decision.
KTS has no back up and thus they will help their students better prepare for secondary schools. I believe they will be very competitive in the secondary school allocation game.