I think the sample size is too small to tell (there are more higher level courses from Coursera, different topics, professors), but from what I've seen of the N

I think the sample size is too small to tell (there are more higher level courses from Coursera, different topics, professors), but from what I've seen of the NLP and Machine Learning Coursera courses versus Probabilistic Robotics, I think that Udacity has the better teaching model: short videos immediately followed by a quiz question, rather than Coursera's more traditional PowerPoint approach with maybe 1 question / 6 minutes or so. Thus hours/week is probably a poor metric (FWIW, I feel like I have spent alot of time on the programming assignments in CS373).