This sheds a lot of light since I was confused about why Visual Composer had changed its name:
The Original Visual Composer Rebranded to WPBakery Page Builder – Why?
The original Visual Composer plugin was first released in May 2011 on CodeCanyon. Since then, the page builder market, and WordPress itself, has evolved a lot. However, the original Visual Composer has remained almost the same in terms of UX.
Since it’s a widely-adopted plugin and comes bundled with most Themeforest themes, revamping the plugin from the ground up was sure to create a lot of backlash.
So, rather than revamping the original WordPress plugin from the ground up, the WPBakery team decided to release a brand new product on their own site and name it Visual Composer Website Builder, while maintaining and selling the original product as WPBakery Page Builder.