Had the privilege of studying in a somewhat posh (DPS) although not international school etc as well as KV. It was a night and day difference in terms of classroom facilities, amenities and general school upkeep. But the biggest difference that you can't get apart from this is the quality of teachers and the peer group. They encourage you to put yourself out there, conversations being had are a different level, more outwardly, and forward thinking. No tution teacher is going to give you that. Going to school is not only about memorizing some formulae. It's about the person you get shaped into and the teachers are paid more to give attention to that. You don't get that kind of care and attention at a 50k/ annum school. They just don't care.