Realty pro buying in Sector 83: payment plan confusion

Honestly, I work in real estate, but buying my own flat in Gurgaon is a different ballgame. Looking at a Ganga Group project in Sector 83. Builders always push Construction-Linked Payment Plans (CLP), bolte hain safer hai. But isn't Down Payment plan better if you have funds? Negotiation power zyada milti hai na? Kya hidden charges dekhun possession ke time? PLC, OC ke alawa aur kya aata hai?