The real questions are definitely the same, because everyone has sorted out the real question bank, and the exercises are edited by teachers according to the industry development after the real questions over the years, which are realistic, so there is no problem of plagiarism. If it is really plagiarism, then as long as it has been tested before, it can not be included in the test questions?

Who copied who?

No matter what you do, you must first treat it fairly. We won't know until we know. There are open classes and test questions on it. If you know, you will know whether it is good, suitable for you and helpful to you.

I suggest you listen to an open class and decide for yourself. I think it's good. Because it is good for all, it depends mainly on whether it is suitable for you. So you have to listen for yourself.