There are lots of important changes except from the addition of boot.
Few are:
# Balancer shaft in petrol engine (a big difference)
# Auto climate control
# Bigger wheel base for better rear space and leg room
# Bigger End to end seat setup for 3 passengers ease
# Dual airbags and abs standard on even lowest trim
# Projector headlamps
# Better infotainment system than Tiago
# Rear parking camera
# Changes in door trims are also there along with size
And lots more..
So now it all depends on the PRICING
All in all amazing product from Tata