A corner plot has two sides open to the road rather than one. That changes three things at once: daylight, ventilation, and what you can do with the setbacks. It also changes the cost and the privacy trade-off, which buyers often do not weigh until they have already lived in one.
What a second open side actually gives you
Daylight. With windows on two elevations, rooms deeper inside the plan can be lit naturally rather than relying on one facade. This matters most on narrow plots.
Cross-ventilation. A second exposure allows air to move through the floor rather than only into it, which changes how the home performs through a Delhi summer.
Privacy, in both directions. The second open side is also a second exposure. A corner facing a busy road is noisier and more overlooked than a mid-block plot of the same size.
More perimeter to build and maintain. Corner plots carry longer boundary walls and more external facade, both of which add to construction and upkeep cost.
Land share. Corner plots are often marginally larger, which raises the proportionate share attached to each floor. That is a quiet advantage at resale.