Noida Extension or Sector 156 for investment?

I'm thinking of investing in Noida. What do you think about Noida Extension vs Sector 156? Which one has better year-on-year growth? Kya kisi ko Hawelia Group ke projects ka experience hai? I'm looking for long-term gains. What's your take on rental yield potential in these areas? Which one would you recommend for better ROI? Mujhe advice chahiye!