Pre-launch offers are a scam for investors — change my mind

Budget finalised, loan pre-approved — now stuck on which sector. I work in real estate but for my own investment, it's different. Builders push pre-launch offers hard, bolte hain best price. Like Shree Balaji Enterprises ka koi naya launch. But is that 'early-bird discount' really better than a resale deal in Panchsheel Green, jahan thoda negotiation scope milta hai? Also, for ROI, should I go for CLP or pay more upfront? Kya strategy sahi rahegi for maximum gains in Noida Extension?