Take a test drive for all.
However, given the options, it is very safe for me to say CUORE.
I got an automatic one last month. Its a pleasure to drive. I had to drive my Mehran yesterday to pick it up from the workshop after repairs and I felt like stopping the car and walk home instead of driving. NO it was not the gear shifts it was the discomfort from every angle.
Revo has space, but do not consider the severly underpowered 800cc one. I could not stand the cheap steering and meter otherwise I was considering Revo, Alto, Cultus, apart from Cuore. But in the end I decided that the traffic jams can be less tiring with Automatic so there was really only one choice.
Picanto is insanely overpriced and then we reach into big cars which are a pain to park, drive in less space, and maintain.