alto is a dinosaur it should be illegal to sell such an unsafe car in pakistan but sadly people are flocking to it like it is made of pure gold.
Don't be tempted to buy a mehran due to it's resale and cheap (low quality) parts.
with the cuore you are at least getting a (somewhat) newer shape and alot more value for money. yes the cuore parts cost more but at the end of the day it's a better car and will last alot longer than a mehran which is just a cheap pile of recycled dalda tins.
best advice i can give you is to try driving both ans seeing which one suits your budget more and which one you would preffer to have in your driveway.
clearly in my eyes the cuore is a MUCH better buy.