Frankly I am not sure why they used both ATD and 6-bromo. I guess it was to appease the people that like one and not the other or to make it seem as though two is better.
They are both good ingredients, ATD being better for on cycle and 6-bromo in PCT because of the libido effects but that is just me. The only thing I disagreed with was the way they marketed the product to be a standalone PCT product on any cycle. Typically I stay out of what companies say because it is their product, but that could be pretty bad to someone who doesn't really know any better.