If you compare the stats between Revo and Mehran, Revo is by far superior. Mehran is an underpowered, overpriced car.
If I were in the situation to buy one, the only worry would be the after sales issues such as availability of spare parts. But because its being manufactured in Pakistan, I don't think it will be difficult.
People who are supporting Suzuki remember this: each time you buy a suzuki car, you are supporting Suzukis dominance in Pakistan. You are also reducing the prospects of jobs in Pakistan. Suzuki, unlike Adam motors, do not care about Pakistan and are only interested in making a profit.
Only Adam motor will plan to construct the car from nothing, meaning that more jobs will be available in the automobile industry. Suzuki has been in Pakistan for decades, and has anything improved since then?
I would rather buy a poor quality Pakistani car than support Suzuki's dominance of Pakistan.