Upgrading to 3BHK: Noida's real cost check

Is super area vs carpet area still a big trap in Noida projects? I'm currently in a 2BHK in Sector 78 and thinking of upgrading to a 3BHK or a small villa, maybe around Sector 140A. Builders like Ashiana Builders show good designs, but I'm worried about the actual usable space. Kya builders still inflate numbers a lot? Already have a home loan, so har extra penny matters. What about floor rise premium and PLC? Is it really worth paying extra for a higher floor ya corner unit? Not sure if the price jump is justified for these things. Also, did anyone buy during pre-launch? Was it actually a discount or just marketing hype?