Downsizing after kids moved out - Noida options?

Dekho, I'm selling my big house now that the kids have moved out. Unnati Vesta Suites is ready to move, right? But Hark Sai Group is cheaper, though under construction. Kitna risk hai? My budget is tight after resale of existing property, so low maintenance is important. Also, hospital nazdeek hona chahiye. Which one is better for senior citizens?