NRI trying to compare projects remotely — this is hard

Okay I'll be honest — I'm finding it incredibly difficult to compare Bangalore projects from Dubai. Looking at Keya Life By The Lake (completed) and Prestige City (ongoing). The advertised price per sqft versus actual carpet area cost is confusing. Prestige City quotes are lower, but what's the real usable space like after all charges? Also, Keya Life boasts amenities, but are they actually functional or just for show? I can't do a site inspection myself, so I need ground truth on amenity usage and maintenance charges for both. Which would attract more tenants and offer better rental potential?