I tested both solutions but none is good enought to rule them all.
I like the azexo solution for the quite good drupal integration with blocks, views etc... but it lack in user interface.
I like the aura user interface, the visual composer is a lot better than the azexo one, but have less integrated with drupal.
But I think the initial direction is not the right one. Both of this page layout composer works with drupal filter system on the body textarea tags. I think it would be far more better and powerful to integrate that visual composer with panels instead. Because it still a nightmare, even with that tools, to deal with core drupal blocks, regions etc.... Panels is good for that as you compose each page as you want.