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?