Under-construction or ready-to-move? Phans gaya!

Looking at Aditya Builders & Developers in Sector 73. Under-construction projects are cheaper, but RERA mein bhi darr lagta hai. Ready-to-move seems safer, but EMI is higher. My wife's priority is kids' school admission, so location matters. Any opinions on balancing risk vs. immediate possession? Koi tips?