I think for 出生率 government is an important factor. Maybe you can government school as a small B (avoid the increasing no of competition) and then DDS is 大 B .
But I do not know if K2 kids can apply for P1. Anybody can help here ?
大 B is more mature, so more advantage in interview
Yes, K2 can also apply for P1 if he is a super big boy.
Being a super big is not just a matter of P1 application. It is a matter of letting your child grow up more confidently and learn more easily and happily.