I noticed that a few days ago. Also interested on the quality of these.
I've used a few of the CPL exams he's got, questions seem more difficult compared to the Bob Tait exams (studied using the Bob Tait books).
I'd argue that both Rob and Bob have missed the mark a little in their practice exams; they vary a fair bit between each other, and Robs are harder than the CASA exam, Bob's are easier than the CASA exam.