At least one clear advantage is that Eclipse is horribly slow in debugging when compared to VS. I don't know how does IntelliJ compare to it because I haven't used that.
Eclipse (at least for Android, I don't know how the platform-specific plugins affect this) is painfully slow period. My workstation is not new, but it is a decent quad core and it does have 8GB of RAM... yet even with nothing but openbox, a browser, and a text editor to contend with, it still manages to bog and lag consistently.