Jx9 - An Embeddable Scripting Engine for C/C++ apps with concepts similar to Lua (jx9.symisc.net)

Well as awesome as this is. . . I think it'd be great if someone can clarify why would you use it instead of Lua?

On a side note: If this is as good as it sounds I think I might be in love with it as much as Lua. :D