Hi Aseem,
I believe it would be hard for anyone to tell you whether you should go ahead and schedule the exam, based on how you scored on different mock exams.
It might have been useful for you to try different simulators because you face different formulations of the PMP questions and different perspectives when describing a scenario.
However, in the end, I preferred to focus my preparation based on a single exam simulator. My recommendation with the PMPrepCast is to do all the tests included and direct your study towards the questions that you either answered incorrectly or marked while answering them correctly. I also repeated some (full) tests more than once.
I felt ready when I started scoring consistently above 85%. Still, it is subjective, and keep in mind that simulator's scores cannot be taken as a predictor of how you are going to perform on the actual exam. Additionally, not knowing the passing score on the real exam, I also found it hard to decide when I was ready to schedule my exam.
Hope this helps.
Good luck with your exam!
Gabriella
