Which gives the best mileage - honda unicorn(not dazzler) or new yamaha ss125? plz tell d fuel effici of both.?

I am planning to buy a new bike. I have zeroed in on yamaha ss125 and honda unicorn(not cb dazzler).which among these two gives the best mileage? Fuel efficiency is my first priority while comfort, cost and performance comes next in that order. please suggest the best bike and mention their respective mileages within city limits. thank you.