Hi
chakri1997,
Iam Devmitra and have been delivering on GMAT Quants for sometime now.
I would like to help you out.
So what exactly is the query?
Q1- Official mock or mocks from other test prep companies? Or
Q2- Which of the mocks is better from among the brands you mentioned?
For Q1-
Introspect on this objectively. Why are you planning to take this mock? Is the primary objective assessment of your GMAT prep or is it to improve on test taking practice?
If its the former, then go for official mocks. These mocks are created using actual retired GMAT questions and are designed to closely replicate the real exam experience. Using official GMAT mocks can give you a better idea of what to expect on test day and can help you gauge your progress as you prepare for the exam.
Here is a post by me on this where I responded to a student on mocks.If its the later, practice a few from the free pool yourself and have a self assessment once you have completed the OG.
This also answers your Q2 to some extent. Don't overthink or over analyse unofficial mocks and use them for practice ony.
This would be my suggestion around this.
Devmitra Sen
GMAT Mentor