Frankly speaking I think William (Smart)'s international class offers quite sophisticated syllabus to kids.
I used to submit the application form by myself during the school hour. The day when I handed in the form, I saw the K2 kids were practising mandarin poetry readings. Their performance tells why this kindergarten has a very good results in poetry readings competition.
Furthermore, their interview is the most serious I met upto now. That's why I think she's a very high potential kindgarten. However, I am living in Ho Man Tin (Ha ha... it's not convenient to me to take my daughter to the edge of Whampoa), so I picked Cannan (Waterloo Rd.) finally.
my case is similars to yours. But I choose William (Smart) and release the offers from Cannan (Whampoa), Cannan(Kln Tong) and Funful. For me, I'm worried that the syllabus for Cannan will be too easy, and Funful is not convenient, it can only be reached by taxi (coz i'll take my daughter to school myself, not going to take the school bus).