Noida property search: Rudra Buildwell vs. JMD Siddh?

Since January I've been checking out options for a bigger 3BHK in Noida. Kids' school admission is getting tough with our current space. JMD Siddh Appartment is ready to move, which is tempting, but my wife's priority is a newer society. Rudra Buildwell Jagdambe Apartments looks good on paper, but it's still under construction. Is the lower price worth the risk of delays? Carpet area efficiency bhi matter karta hai, honestly not sure which offers more usable space. Thoughts?