Is pre-launch in Noida Extension still a real discount?

Visited a few projects in Phase 2 last weekend, including Prithvi Associates. Builders are pushing pre-launch offers big time for new towers. But honestly, is pre-launch pricing still a real discount in Noida Extension, ya bas hype hai? I'm trying to figure out if it's better to jump in early with CLP or wait for RTM. Also, this super area vs carpet area game, kitna difference aata hai on paper versus actual usable space? For an investor, which payment plan makes more sense for better ROI, construction-linked or down payment? Thoda confused hoon.