two different systems, depend on you want IB or the Canadian exam. YCIS IB r ...
YC only has 68 students to attend IB exam, whereas ESF has 9XX. They are not comparable. If you still want to compare, you would see KGV and West IS got a higher score.
Prioritize your choices:
1) which grade you are talking about?
2) curriculum
3) teacher's quality
4) campus / facilites / location
5) student mix
6) school administration / communication with parents
7) school fee
BTW, the IB result/university placement is not the only way to make a comparison.
Basically, you have money, you can study in YC. CAIS is a Christian school. They are not commercial. I live so close to this school. The students are pretty good. They will have a nice school in year 2016. Due to the expansion, admission may be easier for these few years.