Drove cuore for 8-9 years, it is better than Mehran and on par with Alto. Specially its gear ratios are very good. In Mehran the 4th gear comes on very early and you miss the 5th gear dearly.
Fuel economy wise I have polarizing experience. The car I had hardly did 11 KM/L while my uncle claims his does 20+ easily (I doubt it, although he has jet of a 70cc in it).
Santro, Chevrolet Joy and Chery QQ are better options though if resale is not an issue and you are able to acquire a good car.
I would have went for a Cultus though.