If you are shopping for a luxury apartment on Golf Course Extension Road in Gurgaon, two projects will inevitably dominate your shortlist: DLF The Arbour in Sector 63, and M3M Altitude in Sector 65. Both are ultra-premium developments. Both are from India's most respected real estate brands. And both will cost you upwards of ₹8 crore. But they are very different products — with different design philosophies, different buyer profiles and different risk-return profiles. Here is