Ready flats: What's the *real* cost?

After 7 years of renting, I'm finally taking the plunge. My landlord hiked rent again, so I'm done. Looking at completed projects in Greater Noida: Greno Green Residency and Rudransh Green Vista. Greno Green seems pricier. Is its total cost of ownership actually better though, considering maintenance, stamp duty, and any hidden charges for ready flats? Rudransh looks more affordable upfront. Which has better 2BHK rental potential? Also, do either have strong RWAs or lingering post-possession issues, even if complete?