Thank you for you reply. This is exactly what I thought. I still have not made up my mind just becasue:
1. Tak Ngan is probably more demanding and tough.
2. Transportation issue.
3. If taking LHT, my daughter can finally go directly into Law Foundation Secondary School which is quite good in TKO. In Tak Ngan's case, there is no 一條龍 secondary school.
4. I'm not familiar with Tak Ngan: just going through the webs and know it is a good school.