I cannot tell which came first but I find it interesting that The demo code on the EmberJS homepage is very similar to the code demonstrated by AngularJS. Just looking at the sample code they are both interesting.At a first look it appears that AngularJS might have better format and structure. There is also some key similarity to KnockoutJS which bodes well for AngularJS. I will have to re-watch their screencasts and then try some examples that are more complicated than a simple todo. I think the best example would be a one-page application rather than snippets.