Noida Ext 3BHK: Payment plan aur super area ke chakkar mein phas gaya

Spent the whole Sunday checking out options in Sector 137 and Greater Noida West. I'm currently in a 2BHK, thinking of upgrading to a 3BHK, maybe around ₹90L. Shree Balaji Enterprises ka ek project dekha Kakrola mein. Unka payment plan construction-linked hai. Is it better than a down payment plan with existing home loan? Also, super area aur carpet area ka difference bahut dikha rahe hain. Is floor-rise premium worth it for a higher floor, ya ground floor hi le lun? Not sure if the extra cost makes sense. Kya bolte ho?