[Kylotan]

That was me. And the difference is that with the menu it is easier to find the information for first and subsequent uses until memorisation takes place, and that the search for that information is prompted at every step. For regularly-used commands, there's no benefit. But for less regularly used commands, they're easier to find within a hierarchical menu system, and for obscure commands you rarely use and will probably never memorise, a dialog based approach reduces the chance of error by providing context-specific feedback. The idea of providing context-specific cues and feedback is key to making an interface more usable and is the main advantage that most windowed environments have over the command-line.