Noida Extension or Sector 25? Confused abt ROI

Noida Extension mein property rate kam hai, but Sector 25 seems more developed. Which will give better ROI in the long run? My parents keep saying Sector 25 is safer. Honestly, I'm confused. Also, is Sarthak Builder reliable? I'm looking at one of their under-construction projects. What's the real deal with possession delays? Seen so many horror stories. Change my mind on Noida Extension if I'm wrong! Tell me why.