(Author here.)
I've taken Dan's crypto class ([2]), so I think I can weigh in.
Obvious difference: not organized as a MOOC. Whether that is good or bad is up to you.
Focus difference: I think Crypto 101 is targetting applied crypto more, whereas the Coursera classes take a more classical introduction. There is nothing wrong with either approach, in my opinion. Just a difference in focus.
Re:Crypto 101
by transedward on Monday November 03, 2014 @07:07AM
(#8550380)
https://www.udacity.com/course/cs387
Udacity also has a applied cryptography, I haven't tried. but it's good if someones has feedback.
Re:Crypto 101
by JoachimSchipper on Monday November 03, 2014 @09:20AM
(#8550846)
I have heard good things about [2] from colleagues. Also, Boneh is a capable cryptographer.
[3] has never been available while this seems only temporarily unavailable.
[1] https://www.coursera.org/course/cryptography
[2] https://www.coursera.org/course/crypto
[3] https://www.coursera.org/course/crypto2