I done both the Jepp and AF courses.

The Jepp will take you less time since you can essentially click through all the pages quickly, and take the tests.

The AF course requires you to continually click pages at regular intervals to run a course timer in order to meet required "study time."

The nice thing about the AF course though is you pay once for the course and that's it. Lifetime renewals for free (only pay to have the paperwork processed or go to the FSDO yourself for free.)