CDNIS vs ESF Hillside

Hi My son got accepted to both schools （K1 and pre reception）.

Any advice or comments please on the following aspects：
- chinese language training
- manner
- discipline
- student mix (Cantonese speakers)
- learning atmosphere
- academics
- way of teaching

I am more tempted to go for CDNIS as 1） it is smaller class 2） we are offered a place in the a.m. Class and 3） guarntee through train school.