Extreme batch at Dwarka centre compromises of the top students of Dwarka centre
whereas the regular batch at VMC Pitampura consists of normal students at Pitampura centre.
From my own experience I would suggest take VMC Pitampura regular batch.
I had faced the same situation three years back and I regret taking VMC Dwarka.
The faculty at VMC Pitampura will be way better than VMC Dwarka and also VMC Pitampura is considered as the main branch.