This particular question will get different answers. This is totally up to the guardians of the child/children. However, this much can be stated that if the parents/guardians want their children to appear in various competitive examinations in India, they should send the children to CBSE schools, because the questions of the competitive examinations follow the CBSE syllabus.
On the other hand, if the guardians want their children to settle in the UK or or any other commonwealth country in future, they should send their children to Cambridge school.
"If you are killed in action, you go to Heaven. If you win, you rule this Earth (as beautiful as Heaven). That is why, O son of Kunti, take a firm resolve and fight!"-- Shrimad Bhagwad Gita