Sohna mein super area ka game kitna chalta hai?

Since last Diwali, I'm checking properties in Sohna, especially near Dwarka Expressway. AS Estate projects bhi dekhe. Builders ka super area vs carpet area game samajh nahi aa raha. I know the tricks, but buying for myself, I need honest opinions. Kitna difference expect karein usually? Brokers ismein help karte hain ya aur confuse karte hain on actual usable space?