And que the return of the look feel wars of the early 90s.
The iconography is similar(i.e. use of a "play" button for running the debugger), but the actual buttons are definitely different between XCode, VS, and Eclipse. XCode uses the iTunes-like circular black triangle on a grey circle button. VS uses a green triangle. Eclipse uses a green circle with a white arrow.
Copying Xcode's UI is not, in itself, a huge issue. But along with all the rest, it just looks rather shabby.