How does this differ from Ruboto http://ruboto.org/ http://ruboto.org/? I've only just started playing with Rubymotion and it does seem very nice. I'm excited

How does this differ from Ruboto http://ruboto.org/ http://ruboto.org/? I've only just started playing with Rubymotion and it does seem very nice. I'm excited its going to support Android too but Ruboto is another piece of technology that also looks exciting.