Antara Noida Phase 1 or Swaraj Homes? Confused!

My parents keep saying go for ready-to-move, like Antara Noida Phase 1. OC mil gaya hai, so that's tension-free. But the price! Swaraj Homes Bharat Petroleum Apartment looks much cheaper per sqft, but under construction hai. Honestly not sure if the risk is worth it for a first property. Carpet area actually kitna milta hai? Anyone booked in Swaraj Homes? Is it worth the wait and possible delay? Ab samajh nahi aa raha. Please suggest!