I think you're comparing two products which are in completely different categories and shouldn't really be compared as they're designed for different things.
Testabolan is unique because it focuses 100% on free testosterone. Free testosterone is important because its the testosterone your body can use for anabolic purposes.
The other product is more focused on increasing testosterone production as a whole.
Both of these would make great additions to a PCT, and would really shine when used together. I use Testabolan both on cycle as well as during PCT