Urbainia Spaces' super area numbers often mislead buyers.

Urbainia Spaces ka super area concept confusing lag raha hai, especially Sector 129 mein. Kids have moved out, so don't need a huge place, but actual carpet area kitna milega, not sure. Construction-linked payment plan mein hidden costs toh nahi aayenge? Resale value bhi dekhni hai. Any advice on checking these details?