Hi, I just took the exam yesterday (11/23/2020) and passed Above Target (AT). I took 3 full length practice exams in the Exam Simulator and scored in the low 80s for all.
I felt the actual PMP exam was much more difficult than the ones on the Exam Simulator. In fact, I would even say up to 50% more difficult.
In my experience, the correct answer in Exam Simulator tests were much easier to spot or a least narrow down to 2 for a 50/50 choice. The actual exam would disguise the correct answer and at least two of the other possible answers would be very similar. Very often, the other answers would also be correct (at least I thought so) but not "the most correct".
I will say, however, that the Exam Simulator did an excellent job of preparing me for the "mindset" of how to pass the actual exam. Reading the descriptions and explanations of correct/incorrect answers was extremely beneficial and a key to success. This will help you to obtain a better understanding of what the questions are truly asking you on the actual exam and what to think about when reviewing other possible answer choices.
Hope this helps and good luck!