It looks like Coursera is trying to scale rapidly. If you look at the potential course offerings, Coursera has much more. The problem is it's harder to control quality. The Machine Learning course is great, but the Computer Vision is much less engaging.
On the other hand, Udacity seems more focused on a couple of core offerings.
Isn't it great that at the beginning the coursera ML course was better than the Udacity AI. And now it seems like the tables have turned. We all are learning about this and the quality of the classes should go up.
On the other hand, Udacity seems more focused on a couple of core offerings.