Yamuna Exp 3BHKs: The hidden cost game

Not proud of this but I almost got duped by a pre-launch scheme. Ab, I'm really struggling to compare 3BHK projects on Yamuna Expressway, Noida Extension. My budget is ₹80L-1.5Cr, but har builder ka calculation alag hai. Super area aur carpet area ka difference itna confusing hai. Like, Lagerstroemia Estate mein base price mein itne hidden charges hain, aur fit-outs bhi nahi. It's impossible to get an actual all-in cost. Is there koi proper way to compare these projects? Ya sab builders aise hi karte hain?