The `Change` event fires for top level items changing. For instance when I do:
~~~ coffeescript
paddle.attr(color: 'blue');
paddle.color // blue
~~~

DataChange happens when the attributes of the model change. You can access it like this, although it's preferred to use the `data` or `get` methods.
~~~
paddle.data(name: 'PC')
paddle.attributes.name // PC
~~~