Visual Composer has a new version. Here are some of the comparisons that jezweb documented for your reference.

1. Visual Composer:
Old vs New

2. Visual Composer is used
to build responsive pages
for any WordPress theme
without coding. Simply
add elements like text,
images and buttons to
your page or post with
drag and drop function

3. The new Visual Composer offers
additional tools and features
like layouts, new elements,
expandable/collapsible text
blocks, always on top preview
button, new drag icon and many
more.
The graphical user interface is
more user friendly and
responsive. You can easily add a
new post or page in an instant.

4. To learn more about the
new Visual Composer
plugin, please visit our
tutorial at:
www.jezweb.info
http://www.jezweb.info/visual-composer-old-vs-new/