Knopman SIE Custom Quiz vs Finals

Hey guys! Seen a bit about Knopman here but just wanted to see if anyone could relate on their experience between the Knopman practices exams and quizzes. I got an 86 on the SIE diagnostic 1 and haven’t taken the other exams. I’ve just been doing a bunch of the custom quiz questions (85-100 Q’s at a time) and found that they’re more challenging than the practice exam.

Anyone have this same experience? Averaging about 76-78 on these quizzes. Are they tougher than the practices and subsequently much tougher than the actual exam?

Unsure if I should keep doing these questions or try out another Diagnostic exam for a better gauge of my preparedness. Taking the exam on Monday!