So... I have only a semi-helpful post.
Not that long ago, I set out to try three or four JS frameworks and pick one. Angular and Ember were at the top of my list to try. I tried Angular first because I had been hearing so much buzz about it. And... well... I never got around to trying anything else. Angular made me so happy that I just kept doing more and more with it.
That being said, I'm still very interested to finally sit down with Ember one of these days. My impression is that Ember may leave me at least as satisfied as I was with Angular.
A great many articles that try to compare frameworks show a clear preference or bias, but this article is one of the better and more objective I've found. Angular and Ember are pretty much neck-and-neck. Although --- and this is a really cool thing this article did --- we can assign weights to each area in which the frameworks were measured. So, for example, I weighted productivity and community the highest, followed by features and flexibility. After I assigned my personal weights, then Ember pulled ahead of Angular.
Short answer: It seems like you can't make a bad decision here. They're almost neck-and-neck in their goodness, and probably either one will leave you feeling happy about your choice.