I disagree that it is better. It is different, and still very good - and they both have their place. For me, when I'm working, there are times I want all my screen real estate available, so the side bar goes away.
For my money, Sidebar *is* better. You want to hide Sidebar? Double-click the icon. Meanwhile, whatever you have dragged to your desktop will stay there, as you would expect I think.
I don't see anything not to like...