Without probing into the contents of Mock vignettes, I ran a search based on titles and found two matches with Topic tests. They are Yee (equity) and Scott (corp). Other than that the mock looks unique.
And you know one thing? If you want to take the mock now then I understand you would like unique questions to gauge your understanding. But if you take the mock very close to the exam date (say a week) I think it won’t hurt to redo same item sets and artificially raise your score. WIth that time frame you have no way of revising material so at least you will go into the exam with high expectations rather than fear.
I think there is great merit in doing the 83 (?) topic tests over and over again, if you have the time, until you score 100% in all of them. That way you will create solid templates in your mind.
I am saying this because initially I tried to shake the entire curriculum to pieces and comprehend everything but then I realized 1) the material is too much and 2) the exam rewards your correct answers not your level of understanding.