After making profile pictures from the navigation bar round, Google+ tweaked the badge number displayed next to the bell icon. The counter is now in a red circle like in iOS, instead of a red square.
Here's a similar screenshot from July 2013:
As you can see there are many subtle changes: there's a "+" next to the name, the bell icon has a different color, the "share" button is smaller, the profile picture is circular, borders and the arrow icon are missing.
{ via Moritz }