Both versions get the job done with basically all the same options. the UABB version has a few more content options like iframe, YouTube, and Vimeo and some nicer opening animations. The PowerPack version has more control over the close button position, more importantly one of the triggers is Exit Intent which can be really useful for lead gen . I really wish one of them would take a page from Elementor and at least add button option that can close or do something else based on a click.