I found MOI to be"smoother" but not as versatile as Rhino. I prefer both of them over others 3d software.

I recommend anyone to download the trial version of Moi, especially if you've worked with Rhino before. It's not as versatile as Rhino, but what it lacks in commands it gains in everything else. It has a much better graphical user interface than Rhino. Everything looks much better, works much better and is much more intuitive. It's certainly more inspiring to work with, hence the name. It's a pity there's no Mac-version, as the app probably would appeal to Mac-users because of its nice interface.