Faridabad flat: Confused about project risks for seniors

Okay, I'll be honest — downsizing in Faridabad is tough. Kids are gone, so we're selling our big place for a compact 2BHK. Looking at Sector 81 or 85. But under-construction vs ready-to-move decision is worrying me. RERA issues... is paying extra for ready-to-move from BPTP or Puri worth the peace of mind? Seniors, your experiences?