The similarity is no coincidence: Sanjoy Mahajan, the principal instructor of the MIT course, did his Ph.D. at Caltech under Sterl Phinney, the instructor for the course you linked. Moreover, half of Sanjoy's dissertation was an order-of-magnitude physics textbook based on Sterl's course (taught for many years with fellow astrophysicist Peter Goldreich, now a professor emeritus).
(N.B. I taught Physics 1 with Sanjoy when we overlapped at Caltech, and Sterl was my Ph.D. advisor as well.)
http://www.its.caltech.edu/~oom/index.html
The course notes aren't nearly as good, but the homework sets have some really fun problems.