What they don't tell you about usable space in Delhi flats

Spent the whole Sunday researching options in New Delhi remotely, yaar. I'm based in Dubai and can't do a site inspection myself. Property Gallery aur DPB Blue Sky Residency dono completed hain. But I'm seriously confused about actual carpet area efficiency. Brochure figures kitne real hain? Also, parking allocation ka kya scene hai? Covered parking properly allotted hai ya lottery system? My biggest worry for rental management is tenant satisfaction. Kaunsa project better rahega for a family looking for good usable space and hassle-free parking? Any ground reality info would be super helpful.