Pihu Infratech Sector 108 — is early-bird pricing actually better?

Sector 108 — Pihu Infratech is showing us 3BHKs. My wife really liked the location for the kids' school. They're pushing pre-launch offers, saying it's the best price. But is early-bird pricing truly a discount, or do prices just rise later anyway? Also, is a construction-linked payment plan smarter than paying more upfront for long-term peace of mind? Trying to figure out the real all-in cost here.