Noida real estate: Under-construction vs ready-to-move, thoughts?

Fed up of renting, finally taking the plunge in Noida. Seeing so many RERA horror stories though. Under-construction projects are cheaper, but is it worth the risk? Saraswati Group has a project in Block B, but possession kab tak milega? Ready-to-move is expensive, but at least ghar toh mil jayega. EMI vs rent math is confusing me, honestly not sure which way to go. Kya kisi ko pata hai? Any experience with under-construction delays?