Apart from LH, I know the pupils of SMC actually come from many different KGs. Eg. KV, SC or other kindergartens in different districts.
As long as the kids have enough training in English and Mandarin from K1 to K3 plus good reading habit, I guess it doesn't really matter which KGs your kid will go to.
In LHK, you may either choose PTH/Eng or Cantonese/Eng.
PTH/Eng - full day will be taught in PTH and Eng. Each class with 1 English and 1 PTH class teachers
Cantonese/Eng - full day will be taught in Cantonese and Eng. Every Tue and Thur will have 1 lesson of PTH. Each class have 1 Enghish and 1 Cantonese class teachers