Noida Extension ya Sector 51? Confused after possession!

Just moved into Sector 51 last month, and tbh, Noida Extension seems much better for investment now. Sector 51 mein connectivity toh achi hai, but appreciation kam lag raha hai. Has anyone seen better ROI in Extension? My friend is suggesting S & U Buildtech Pvt Ltd projects there. Kya kisi ko pata hai about their current projects? Should I consider buying another property there for investment? Confused after seeing the market, yaar.