CFAI mock exam question

Can someone please explain to me the difference between the 2 mock exams on the CFAI website (Mock Exam 4 Assessments)? It shows two mock exams with an AM and PM section; however, the AM sections are still vignette style questions. Whats up with this? Are one of these the 2014 PM mock?

Also, anyone do the topic based practice test? and good?

Thanks.