The main differences I see are:
ROS: allows "all others negative" when documented with pertinent negatives/positives of other systems for a Complete ROS
Exam: Novitas training (on their site - E&M Scorecard webinars) indicates that a Detailed exam can be met when documentation of 4 elements of 4 different systems/areas support the exam
MDM- different design of tool with changes to the "number of DX/treatment options" and "amount/complexity of data reviewed" - risk table stays the same. Seems simpler.
I like the E\M University tool because it is such a comprehensive blend of both 95 and 97 guidelines and we use both extensively. Will figure out a way to make it work. Thanks!