What's the real total cost for DDA LIG or Sun Affordable Flats?

Possession was in March for my place, and the total cost of ownership shocked me. Now helping a relative with DDA GH 8 LIG Flats vs Sun Affordable Flats in Delhi. Sun's carpet area looks decent, but what's the actual price per sqft after all charges? For DDA, are the amenities truly usable? What's the real total cost of ownership for these options?