These Elementor gallery widgets are very competitive with top Galley plugins like FooGallery or Envira Galley. Elementor’s gallery widgets have a host of features including popular layouts [masonry, justified, and grid], lighthbox display of full size images, captioning of images, display of all or category limited image selections, special pagination, etc. The Pro Gallery plugins add video  and other objects for display, special text, icon, or other overlays, etc. 

But the bottom line is with PageBuilder market place already being crowded and finally being impacted by Gutenberg Builder libraries still behind in widget styling options and full theme templates but closing fast; the result is expect to see more PageBuilder widgets that add Pro Plugin features.