No point purchasing a used Cruze:
It's actually less comfortable than the Optra magnum (check rear seats).
A used Diesel is always unrecommended.
A used GM is further unrecommended.
Pathetic resale value of Cruze, further considering you will be the 2nd owner.
So it's just Verna vs. Optra Magnum. In this comparison too, the Verna has a way upper hand:
Verna:
+Looks!
+Reliability
+Fresher and more feature-filled Interiors
+Cheaper and more easily available A.S.S. and parts
+Resale value
+Fuel economy
+Headroom
+Ground clearance
+Turns better than the Cruze
+Latest car, unlike the out-of-production optra
-Performance in comparison to optra
-Legroom in comparison to optra
Regarding the model to be chosen, I would totally recommend a visit to the showroom. It's a matter of personal opinion and budget.
http://www.carwale.com/research/com....aspx?car1=2151&car2=2150&car3=1204&car4=1620
Checkout the "All features" tab for a quick comfort comparison.