Ready to move projects are always better in Noida, right?

Need to decide ASAP. Unibera Mea Apartments vs Sai Upvan. Ready to move is a must since kids' school admission is next year. Sai Upvan looks cheaper, but carpet area kitna kam hoga? My wife's priority is safety, so which society is better maintained? Heard registry issues are common; what's the real story? Frankly, I'm confused. Any advice before I book? Hope someone has some insights. Thanks!