My Noida flat hunt: Super area vs. carpet area confusion

Since January I've been shortlisting flats in this city. I work in real estate, but khud ke liye buying is different. Builders ka super area vs carpet area game toh pata hai. Marshal Buildcon ke Omega II project mein bhi wahi scene. Kitna inflate karte hain? Is it really worth paying for that extra 30% phantom space? Kya actual difference aata hai final price mein, ya bas paper pe hai?