KCIS vs. ESF

KCIS and ESF QBS which one is better in terms of:

School environment, teachers' quality
Overall academic achievement
Overall students' quality/ conduct
English standard among students
Reputation

I understand it may be a little difficult to compare especially when we talk about academic... Both offer different curriculums, with ESF offering IB, but still, hope you could share your views.

Appreciate your advice.