The first two listed applications are the payed and unpayed version.
On top of that, with introducing their new subscription based tooling, they updated the tools and all the exams on associated and owned websites, they cannot be run with versions prior to the new VCE 1.2 programs. Why? Avanset (a subsidiary of Certplex Ltd) has decided to follow a new and aggressive pricing strategy, as illustrated on the left.
In my case Avanset’s VCE Exam Simulator, which I once bought. One of them is self-preparation before I actually take an exam, by the means of a test exam with software to go with it. There are a couple of routes to go and it depends on the goal and my own knowledge which one I’ll take.
As you might know, I’m an IT-guy and thus I need to update my certifications and skills regularly.