I found something different, no more Boinx FotoMagico in the Pro version! That is a sad loss since it was my most used app out of the extras. Instead they are included the Roxio Akrilic app which does not replace that functionality from what I read on the site.
One other thing is they upgraded AfterShot to AfterShot Pro. That is a good bonus.
And of course the new WinZip 7 for Mac.
So far that is all I can find after comparing 17 Pro to 18 Pro. Standard, there are even less changes that I can see via the web site. Less bugs on launch maybe?