My friend have recently joined Rau’s IAS Study Circle and there are only 90 students in his batch and its same for all the other batches in Bangalore. So go with Rau’s if you want to join a small group coaching centre.
If you are an introvert and have issues to study in groups comprising of many students then its better that you join Rau’s IAS Study Circle in Bangalore as they have only 80-90 students in each group.