Any one inform me, Difference between Khyber and Mehran, their petrol/CNG consumption difference.

Like if i will go in karachi from Sohrab Goth to to Tower with Return, suzuki FX consumes only Rs. 70 Gas or can say

only 1 cng point will consume.

What about in Khyber. I m going to purchase it. i m confuse either i purchase khyber or mehran ???

i dont have too much amount for daily more consumption for gas.